A297318 - OEIS

%I #4 Dec 28 2017 07:31:15

%S 1,200,3159,29212,484808,8273245,121339476,1815438259,27950049482,

%T 426949482189,6494779570376,98961790075322,1508712969034695,

%U 22994788538451691,350445360895775177,5341072484013959839

%N Number of 5Xn 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 or 2 neighboring 1s.

%C Row 5 of A297314.

%H R. H. Hardin, <a href="/A297318/b297318.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A297314.

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 28 2017