A302275 - OEIS

%I #7 Apr 05 2018 04:09:42

%S 3,27,74,283,1219,3854,14639,63093,222254,867269,3651231,13909218,

%T 55448467,230250019,911892066,3685592711,15189545391,61267056156,

%U 249395546907,1024061684191,4165273608452,17011882082021,69737883682027

%N Number of n X 5 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%C Column 5 of A302278.

%H R. H. Hardin, <a href="/A302275/b302275.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5:

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

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

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

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

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

%Y Cf. A302278.

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 04 2018