A303181 - OEIS

%I #4 Apr 19 2018 13:24:42

%S 64,361,873,6668,88153,1064399,11901719,141429948,1665576584,

%T 19531596851,229828243748,2702369176839,31772132296596,

%U 373609367008990,4392997891254184,51654822706157964,607381965429018032

%N Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%C Column 7 of A303182.

%H R. H. Hardin, <a href="/A303181/b303181.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A303182.

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 19 2018