Revision History for A060977
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| A060977
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The nonprimes n!+2 ... n!+n are the a(n)-th string of n-1 prime-free consecutive terms, the first such one being the string of composite numbers A000230(k)+1 through A001632(k)-1 when n=2k, or through A001632(k)-2 when n=2k-1.
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published version)
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#11 by Joerg Arndt at Wed Jan 11 05:07:30 EST 2023
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#10 by Michel Marcus at Wed Jan 11 03:12:53 EST 2023
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#9 by Sean A. Irvine at Wed Jan 11 03:08:38 EST 2023
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#8 by Sean A. Irvine at Wed Jan 11 03:08:22 EST 2023
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| DATA
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0, 1, 1, 6, 27, 208, 1755, 16363, 161685, 1736749, 20022517, 250566242, 3359504253
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| EXTENSIONS
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a(13) from Sean A. Irvine, Jan 11 2023
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approved
editing
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#7 by Jon E. Schoenfield at Thu Mar 12 23:52:36 EDT 2015
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#6 by Jon E. Schoenfield at Thu Mar 12 23:52:33 EDT 2015
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| EXAMPLE
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The prime-free sequence 4!+! + 2 through 4!+! + 4, i.e. {., {26, 27, 28}, ranks as the a(4)=6-th) = 6th triple of consecutive composite numbers, as it comes after {8, 9, 10}, {14, 15, 16}, {20, 21, 22}, {24, 25, 26}, {25, 26, 27}.
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approved
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#5 by Russ Cox at Sat Mar 31 10:25:58 EDT 2012
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| AUTHOR
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_Lekraj Beedassy (blekraj(AT)yahoo.com), _, May 10 2001
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Discussion
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| Sat Mar 31
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| OEIS Server: https://oeis.org/edit/global/489
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#4 by Russ Cox at Fri Mar 30 17:30:31 EDT 2012
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| EXTENSIONS
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More terms from _Robert G. Wilson v (rgwv(AT)rgwv.com), _, Aug 17 2001
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Discussion
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| Fri Mar 30
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| OEIS Server: https://oeis.org/edit/global/156
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#3 by N. J. A. Sloane at Sun Jun 29 03:00:00 EDT 2008
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| KEYWORD
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more,nonn,nice,new
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| AUTHOR
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Lekraj Beedassy (boodhimanblekraj(AT)yahoo.com), May 10 2001
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#2 by N. J. A. Sloane at Wed Sep 22 03:00:00 EDT 2004
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| NAME
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The non-primesnonprimes n!+2 ... n!+n are the a(n)-th string of n-1 prime-free consecutive terms, the first such one being the string of composite numbers A000230(k)+1 through A001632(k)-1 when n=2k, or through A001632(k)-2 when n=2k-1.
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| EXAMPLE
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The prime-free sequence 4!+2 through 4!+4, i.e. {26, 27, 28}, ranks as the a(4)=6-th triplettriple of consecutive composite numbers, as it comes after {8, 9, 10}, {14, 15, 16}, {20, 21, 22}, {24, 25, 26}, {25, 26, 27}.
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| KEYWORD
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more,nonn,nice,new
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| AUTHOR
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Lekraj Beedassy (beedassylekrajboodhiman(AT)hotmailyahoo.com), May 10 2001
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