A159368 - OEIS

%I #5 Dec 18 2015 18:17:19

%S 8,4128,302584,17289088,431618400,5843691072,51994744888,341923672256,

%T 1790204522040,7843639778000,29783241318072,100543943539168,

%U 307621147208752,865756612732656,2267642899483800,5579948480151808

%N Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 7

%H R. H. Hardin, <a href="/A159368/b159368.txt">Table of n, a(n) for n=3..27</a>

%K nonn

%O 3,1

%A _R. H. Hardin_ Apr 11 2009