A300497 - OEIS

%I #4 Mar 07 2018 07:24:11

%S 64,1063,3699,14822,66166,291721,1296506,5589526,24694845,110652439,

%T 496922595,2235496431,10093633015,45708631844,207362510529,

%U 942134125486,4286125546700,19519540829724,88968137138219,405767287357238

%N Number of nX7 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 7 of A300498.

%H R. H. Hardin, <a href="/A300497/b300497.txt">Table of n, a(n) for n = 1..150</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A300498.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 07 2018