A281973 Number of sets of exactly n positive integers <= n+10 having a square element sum.

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

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: A284964 A344247 A333770 * A219557 A094538 A343735

Adjacent sequences: A281970 A281971 A281972 * A281974 A281975 A281976

Keyword

nonn

Author

Alois P. Heinz, Feb 03 2017

Status

approved