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A281973 Number of sets of exactly n positive integers <= n+10 having a square element sum. 2
1, 3, 9, 33, 93, 242, 568, 1237, 2532, 4905, 9071, 16113, 27654, 45997, 74388, 117408, 181271, 274163, 407066, 594568, 855087, 1211979, 1695785, 2344564, 3204123, 4332497, 5802690, 7699864, 10126446, 13212343, 17109772, 21991217, 28071644, 35611707, 44895662 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..1000

FORMULA

a(n) = A281871(n+10,n).

EXAMPLE

a(0) = 1: {}.

a(1) = 3: {1}, {4}, {9}.

a(2) = 9: {1,3}, {1,8}, {2,7}, {3,6}, {4,5}, {4,12}, {5,11}, {6,10}, {7,9}.

CROSSREFS

A diagonal of A281871.

Sequence in context: A297209 A058138 A284964 * A219557 A094538 A037129

Adjacent sequences:  A281970 A281971 A281972 * A281974 A281975 A281976

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Feb 03 2017

STATUS

approved

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Last modified February 20 12:57 EST 2019. Contains 320327 sequences. (Running on oeis4.)