The On-Line Encyclopedia of Integer Sequences (OEIS)

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Revision History for A066250

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A066250

a(n) = if n+1 is prime then A049084(n+1)*2 - 1 else A066246(n+1)*2.
(history; published version)

#6 by Russ Cox at Fri Mar 30 18:50:19 EDT 2012

AUTHOR

_Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), _, Dec 09 2001

Discussion

Fri Mar 30

18:50

OEIS Server: https://oeis.org/edit/global/246

#5 by Russ Cox at Sun Jul 10 18:39:34 EDT 2011

LINKS

<a href="/Sindx_index/Per.html#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>

Discussion

Sun Jul 10

18:39

OEIS Server: https://oeis.org/edit/global/66

#4 by N. J. A. Sloane at Thu Nov 11 07:34:06 EST 2010

LINKS

<a href="/Sindx_Per.html#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>

KEYWORD

nonn,new

nonn

#3 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009

LINKS

<a href="http://www.research.att.com/~njas/sequences/Sindx_Per.html#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>

KEYWORD

nonn,new

nonn

#2 by N. J. A. Sloane at Fri Jan 09 03:00:00 EST 2009

KEYWORD

nonn,new

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystemsgmail.com), Dec 09 2001

#1 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

NAME

a(n) = if n+1 is prime then A049084(n+1)*2 - 1 else A066246(n+1)*2.

DATA

1, 3, 2, 5, 4, 7, 6, 8, 10, 9, 12, 11, 14, 16, 18, 13, 20, 15, 22, 24, 26, 17, 28, 30, 32, 34, 36, 19, 38, 21, 40, 42, 44, 46, 48, 23, 50, 52, 54, 25, 56, 27, 58, 60, 62, 29, 64, 66, 68, 70, 72, 31, 74, 76, 78, 80, 82, 33, 84, 35, 86, 88, 90, 92, 94, 37, 96, 98, 100, 39, 102

OFFSET

1,2

COMMENTS

Permutation of natural numbers; inverse: A066251.

LINKS

<a href="http://www.research.att.com/~njas/sequences/Sindx_Per.html#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>

FORMULA

a(n) = A026238(n+1)*2 - A010051(n+1).

CROSSREFS

Cf. A066251, A049084, A066246, A026238, A010051, A066248, A066254.

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Dec 09 2001

STATUS

approved