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

1,3

Comments

Diagonal of A302150.

Links

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

Example

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

Crossrefs

Cf. A302150.

Sequence in context: A126776 A214143 A320986 * A015489 A153061 A277762

Adjacent sequences: A302142 A302143 A302144 * A302146 A302147 A302148

Keyword

nonn

Author

R. H. Hardin, Apr 02 2018

Status

approved