A159365 - OEIS

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

%S 68,7528,1342880,70479520,1300635716,13122289480,89513533984,

%T 463682260368,1957228050788,7050450758456,22378737304048,

%U 64051043401424,168180699845668,410514771713816,941216251381264,2043898609681792

%N Number of n X n arrays of squares of integers with every (n-2)X(n-2) subblock summing to 6

%H R. H. Hardin, <a href="/A159365/b159365.txt">Table of n, a(n) for n=4..25</a>

%K nonn

%O 4,1

%A _R. H. Hardin_ Apr 11 2009