A296404 - OEIS

%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