The On-Line Encyclopedia of Integer Sequences (OEIS)

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Revision History for A326064

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A326064

Odd composite numbers n, not squares of primes, such that (A001065(n) - A032742(n)) divides (n - A032742(n)), where A032742 gives the largest proper divisor, and A001065 is the sum of proper divisors.
(history; published version)

#24 by Joerg Arndt at Thu Dec 24 04:48:12 EST 2020

STATUS

reviewed

approved

#23 by Michel Marcus at Thu Dec 24 03:49:08 EST 2020

STATUS

proposed

reviewed

#22 by Amiram Eldar at Thu Dec 24 03:13:26 EST 2020

STATUS

editing

proposed

#21 by Amiram Eldar at Thu Dec 24 03:05:18 EST 2020

DATA

117, 775, 10309, 56347, 88723, 2896363, 9597529, 12326221, 12654079, 25774633, 29817121, 63455131, 105100903, 203822581, 261019543, 296765173, 422857021, 573332713, 782481673, 900952687, 1129152721, 3350861677, 3703086229, 7395290407, 9347001661, 9350506057

KEYWORD

nonn,more

nonn

EXTENSIONS

More terms from Amiram Eldar, Dec 24 2020

STATUS

approved

editing

#20 by Sean A. Irvine at Sat Jun 22 19:06:22 EDT 2019

STATUS

proposed

approved

#19 by Michael De Vlieger at Sat Jun 22 15:02:04 EDT 2019

STATUS

editing

proposed

#18 by Michael De Vlieger at Sat Jun 22 15:02:02 EDT 2019

MATHEMATICA

Select[Range[15, 10^6 + 1, 2], And[! PrimePowerQ@ #1, Mod[#1 - #2, #2 - #3] == 0] & @@ {#, DivisorSigma[1, #] - #, Divisors[#][[-2]]} &] (* Michael De Vlieger, Jun 22 2019 *)

STATUS

proposed

editing

#17 by Antti Karttunen at Mon Jun 17 17:23:50 EDT 2019

STATUS

editing

proposed

#16 by Antti Karttunen at Mon Jun 17 17:12:38 EDT 2019

LINKS

<a href="/index/O#opnseqs">Index entries for sequences where any odd perfect numbers must occur</a>

STATUS

approved

editing

#15 by Susanna Cuyler at Sun Jun 09 11:04:20 EDT 2019

STATUS

proposed

approved