A302731 - OEIS

%I #4 Apr 12 2018 10:56:37

%S 0,162,1079,941,4491,20842,89121,286746,1022779,4520360,18491493,

%T 67714259,259145846,1045498404,4177884352,16077695845,62395241080,

%U 246809269806,974367008077,3802389262429,14855944546521,58398777429077

%N Number of 6Xn 0..1 arrays with every element equal to 1, 2, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%C Row 6 of A302728.

%H R. H. Hardin, <a href="/A302731/b302731.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

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

%Y Cf. A302728.

%K nonn

%O 1,2

%A _R. H. Hardin_, Apr 12 2018