A007511 - OEIS

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).

2, 50, 325, 1105, 5525, 27625, 71825, 138125, 160225, 801125, 2082925, 4005625, 5928325, 29641625, 77068225, 148208125, 243061325, 1215306625, 3159797225, 6076533125, 12882250225, 53716552825, 64411251125, 167469252925, 322056255625, 785817263725

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OFFSET

1,1

COMMENTS

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

LINKS

Table of n, a(n) for n=1..26.

J. Meeus, Note

CROSSREFS

Cf. A048610.

Sequence in context: A226408 A226337 A048610 * A016032 A080299 A083939

Adjacent sequences: A007508 A007509 A007510 * A007512 A007513 A007514

KEYWORD

nonn

AUTHOR

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

EXTENSIONS

a(12)-a(18) from Donovan Johnson, Sep 03 2008

a(19)-a(24) from Donovan Johnson, Jul 01 2009

a(25)-a(26) from Donovan Johnson, Aug 30 2011

STATUS

approved