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Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
0

%I #11 Mar 31 2018 16:59:29

%S 1,3,4,40,808,47487,6236246,1923849671,1369615742014,2343154648689254

%N Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Diagonal of A300888.

%e Some solutions for n=5:

%e 0 1 1 1 1 0 1 1 1 1 0 1 1 1 1 0 1 0 0 1

%e 1 1 1 0 0 1 1 0 1 1 1 1 1 0 0 0 0 0 0 0

%e 1 0 0 0 0 1 1 0 1 1 1 0 0 0 0 0 0 1 0 0

%e 1 1 1 1 0 1 1 1 1 0 1 1 1 0 0 0 0 0 0 1

%e 1 1 1 1 1 0 1 1 1 1 1 1 1 1 0 1 1 0 0 0

%Y Cf. A300888.

%K nonn,more

%O 1,2

%A _R. H. Hardin_, Mar 14 2018