A281970 - OEIS

%I #6 Feb 03 2017 20:02:36

%S 1,2,6,15,34,71,134,238,405,660,1030,1559,2310,3336,4691,6500,8886,

%T 11899,15709,20584,26624,33926,42974,54080,67172,82800,101787,124031,

%U 149660,180251,216171,256730,303737,359036,421356,491196,572792,665539,767239,883380

%N Number of sets of exactly n positive integers <= n+7 having a square element sum.

%H Alois P. Heinz, <a href="/A281970/b281970.txt">Table of n, a(n) for n = 0..1000</a>

%F a(n) = A281871(n+7,n).

%e a(3) = 15: {1,2,6}, {1,3,5}, {1,5,10}, {1,6,9}, {1,7,8}, {2,3,4}, {2,4,10}, {2,5,9}, {2,6,8}, {3,4,9}, {3,5,8}, {3,6,7}, {4,5,7}, {6,9,10}, {7,8,10}.

%Y A diagonal of A281871.

%K nonn

%O 0,2

%A _Alois P. Heinz_, Feb 03 2017