login
Number of nX6 0..1 arrays with every element equal to 1, 2, 3 or 4 king-move adjacent elements, with upper left element zero.
1

%I #4 Jan 08 2018 08:11:36

%S 5,793,18451,366976,7960069,173216147,3751364813,81401727872,

%T 1766726336073,38339105704330,832050074637694,18057979242252331,

%U 391910474843289621,8505610543942748030,184597240091316219578

%N Number of nX6 0..1 arrays with every element equal to 1, 2, 3 or 4 king-move adjacent elements, with upper left element zero.

%C Column 6 of A297923.

%H R. H. Hardin, <a href="/A297921/b297921.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

%Y Cf. A297923.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 08 2018