A281972 - OEIS

%I #6 Feb 03 2017 20:31:43

%S 1,3,8,26,69,166,365,750,1446,2646,4645,7856,12852,20411,31626,47910,

%T 71022,103342,147982,208554,289572,397140,538319,720965,955716,

%U 1255661,1634233,2108003,2699453,3431884,4329465,5426928,6764353,8377805,10314695,12640228

%N Number of sets of exactly n positive integers <= n+9 having a square element sum.

%H Alois P. Heinz, <a href="/A281972/b281972.txt">Table of n, a(n) for n = 0..1000</a>

%F a(n) = A281871(n+9,n).

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

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

%Y A diagonal of A281871.

%K nonn

%O 0,2

%A _Alois P. Heinz_, Feb 03 2017