A302145 Number of n X n 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.

1, 1, 4, 17, 289, 15999, 1728734, 476725579, 338788296901, 600144995821877, 2721126689318370799, 31005436248594896441733, 885614872309613750483721526, 63247599647658758935122240950370, 11261549689102506355299411976654023890

Offset: 1

Author

R. H. Hardin, Apr 02 2018

Keywords

• nonn

Comments

Diagonal of A302150.

Examples

			Some solutions for n=5
..0..1..1..1..1. .0..1..1..0..0. .0..1..1..0..0. .0..1..1..0..0
..1..1..1..1..1. .1..1..0..0..0. .1..1..0..0..1. .1..1..0..0..1
..1..1..1..1..0. .1..1..0..0..0. .1..1..0..0..0. .1..1..1..0..0
..1..1..0..1..1. .1..1..1..0..0. .1..1..1..0..0. .1..1..0..0..0
..1..1..1..1..0. .1..1..0..0..1. .1..1..0..0..1. .0..1..0..0..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..16

Crossrefs

Cf. A302150.