|
%I #6 Mar 25 2023 22:19:46
%S 1,289,4560,110554,3939121,107541673,3068113721,90097748288,
%T 2600708602697,75199003513063,2177790921375079,63025869220333603,
%U 1824132928895167966,52797260271592457318,1528116017845740163428
%N Number of n X 7 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 2 or 3 neighboring 1's.
%C Column 7 of A296405.
%H R. H. Hardin, <a href="/A296404/b296404.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..1..1..0..1..1..0..0. .0..0..0..0..1..1..0. .0..0..1..0..0..0..1
%e ..1..0..1..1..0..1..1. .0..0..0..1..0..1..1. .0..1..1..1..0..1..1
%e ..1..1..0..0..1..0..1. .0..1..1..0..0..1..0. .1..0..0..1..0..0..0
%e ..1..0..0..1..1..1..0. .0..1..0..0..0..0..0. .1..1..1..1..0..0..0
%Y Cf. A296405.
%K nonn
%O 1,2
%A _R. H. Hardin_, Dec 11 2017
| 