|
%I #6 May 03 2020 15:34:45
%S 1,10,231,11024,2525244,1906300826,3863740405975,26223048303944542,
%T 618905182069042142432,45235515405863464673598537
%N Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 2 or 3 neighboring 1's.
%C Diagonal of A297654.
%e Some solutions for n=4
%e ..1..1..1..0. .0..1..0..1. .1..0..1..0. .0..1..1..0. .1..1..1..1
%e ..1..0..0..0. .1..0..1..1. .0..1..0..1. .1..0..0..0. .1..0..0..0
%e ..0..0..1..0. .0..0..1..0. .1..1..0..0. .0..0..1..0. .0..1..1..0
%e ..0..0..0..1. .1..1..0..1. .0..1..0..0. .0..0..1..1. .1..1..0..1
%Y Cf. A297654.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jan 02 2018
| 