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A007511 a(n) is the smallest number greater than a(n-1) that is expressible as the sum of two squares in more ways than a(n-1). 4

%I #14 Dec 20 2017 23:27:39

%S 2,50,325,1105,5525,27625,71825,138125,160225,801125,2082925,4005625,

%T 5928325,29641625,77068225,148208125,243061325,1215306625,3159797225,

%U 6076533125,12882250225,53716552825,64411251125,167469252925,322056255625,785817263725

%N a(n) is the smallest number greater than a(n-1) that is expressible as the sum of two squares in more ways than a(n-1).

%C Sequence provides the locations of records in A025426 (nonzero squares), rather than in A000161 (definition of squares includes zeros). - _R. J. Mathar_, Jun 06 2007

%H J. Meeus, <a href="/A007511/a007511.pdf">Note</a>

%Y Cf. A048610.

%K nonn

%O 1,1

%A Gabriel Cunningham (gcasey(AT)mit.edu), Feb 29 2004

%E a(12)-a(18) from _Donovan Johnson_, Sep 03 2008

%E a(19)-a(24) from _Donovan Johnson_, Jul 01 2009

%E a(25)-a(26) from _Donovan Johnson_, Aug 30 2011

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)