A300644 - OEIS

%I #4 Mar 10 2018 10:39:08

%S 0,19,104,1789,28089,456649,7455411,121708555,1990954802,32547397369,

%T 532327808168,8705226732028,142365129531729,2328217142648763,

%U 38075317550124085,622678903591246459,10183203860874999028

%N Number of nX6 0..1 arrays with every element equal to 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 6 of A300646.

%H R. H. Hardin, <a href="/A300644/b300644.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A300646.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 10 2018