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Number of n X n arrays of squares of integers with every (n-2) X (n-2) subblock summing to 6 and every element equal to at least one neighbor.
1

%I #6 Apr 23 2021 10:57:27

%S 0,98,34778,290306,1182610,3573766,9017466,20075266,40694834,76649830,

%T 136042186,229866786,372638546,583081894,884882650,1307502306,

%U 1887054706,2667245126

%N Number of n X n arrays of squares of integers with every (n-2) X (n-2) subblock summing to 6 and every element equal to at least one neighbor.

%K nonn

%O 4,2

%A _R. H. Hardin_ Apr 14 2009