A302730 - OEIS

%I #4 Apr 12 2018 10:55:58

%S 0,61,301,353,1307,4505,16265,46773,136935,481479,1631059,5055540,

%T 16067446,52668892,175365361,562163896,1807393316,5893267465,

%U 19311336692,62623833763,202770902304,659588139794,2152022230238,6997053941406

%N Number of 5Xn 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 5 of A302728.

%H R. H. Hardin, <a href="/A302730/b302730.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A302728.

%K nonn

%O 1,2

%A _R. H. Hardin_, Apr 12 2018