The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A056534 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A056534

Mapping from the ordering by product (A027750, A056538) to the ordering by sum (A002260, A004736) of ordered pairs (a,b), a>=1, b>=1.
(history; published version)

#14 by Michel Marcus at Sun Jun 05 09:53:21 EDT 2016

STATUS

reviewed

approved

#13 by Joerg Arndt at Sun Jun 05 09:41:18 EDT 2016

STATUS

proposed

reviewed

#12 by Ivan Neretin at Sun Jun 05 07:24:30 EDT 2016

STATUS

editing

proposed

#11 by Ivan Neretin at Sun Jun 05 07:24:23 EDT 2016

LINKS

Ivan Neretin, <a href="/A056534/b056534.txt">Table of n, a(n) for n = 1..10000</a>

STATUS

approved

editing

#10 by Charles R Greathouse IV at Thu May 01 02:47:40 EDT 2014

AUTHOR

_Antti Karttunen _, Jun 20, 2000

Discussion

Thu May 01

02:47

OEIS Server: https://oeis.org/edit/global/2208

#9 by Bruno Berselli at Fri Oct 05 07:58:43 EDT 2012

STATUS

proposed

approved

#8 by Jean-François Alcover at Fri Oct 05 04:48:09 EDT 2012

STATUS

editing

proposed

#7 by Jean-François Alcover at Fri Oct 05 04:48:03 EDT 2012

MATHEMATICA

max = 21; A056534 = {}; For[i = 1, i <= max, i++, Do[ AppendTo[ A056534, Binomial[i/j + j - 1, 2] + j], {j, Divisors[i]}]]; A056534 (* Jean-François Alcover, Oct 05 2012, after Maple *)

STATUS

approved

editing

#6 by Russ Cox at Sun Jul 10 18:39:19 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

#5 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