A296123 - OEIS

%I #6 Apr 26 2020 20:58:01

%S 1,5,18,74,2098,54286,1810441,227074899,41069612676,11999602459480,

%T 8460640112181759,10489963059013433653

%N Number of n X n 0..1 arrays with each 1 adjacent to 2 or 5 king-move neighboring 1's.

%C Diagonal of A296128.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A296128.

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 05 2017