|
%I #6 Apr 05 2020 23:35:23
%S 3,2421,183390,25760875,2439241607,332113863074,35072966294346,
%T 4615203834449304,519140871714574338,66784349259505575111,
%U 7809000921229551589905,991318340748862385457430
%N Number of n X 7 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.
%C Column 7 of A289651.
%H R. H. Hardin, <a href="/A289650/b289650.txt">Table of n, a(n) for n = 1..31</a>
%e Some solutions for n=3
%e ..0..0..0..0..0..1..0. .0..0..0..1..0..1..1. .0..1..0..0..0..0..1
%e ..0..1..1..0..1..0..0. .1..0..1..1..0..0..0. .1..0..0..0..0..1..1
%e ..0..1..1..1..1..0..1. .1..1..0..0..0..0..1. .0..0..0..0..0..1..1
%Y Cf. A289651.
%K nonn
%O 1,1
%A _R. H. Hardin_, Jul 09 2017
| 