A301955 - OEIS

%I #4 Mar 29 2018 12:48:51

%S 0,89,1411,56710,1608681,58609226,1969215107,67333850084,

%T 2287773842566,77959998302605,2653916633152707,90371628086108933,

%U 3077076307444521060,104774663297551634379,3567555401986729558326,121474804497455764013977

%N Number of 6Xn 0..1 arrays with every element equal to 1, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.

%C Row 6 of A301951.

%H R. H. Hardin, <a href="/A301955/b301955.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

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

%Y Cf. A301951.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 29 2018