A300940 - OEIS

%I #4 Mar 16 2018 09:04:24

%S 5,3,12,38,75,186,530,1401,3811,10666,29764,85074,243478,700526,

%T 2028715,5890335,17145198,50000931,145968525,426553602,1247498091,

%U 3650210391,10684555961,31283438794,91612270064,268323435201,785979716062

%N Number of nX4 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 4 of A300944.

%H R. H. Hardin, <a href="/A300940/b300940.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A300944.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 16 2018