A275137 Number of n X n 0..2 arrays with no element equal to any value at offset (-2,-2) (-1,-2) or (0,-1) and new values introduced in order 0..2.

1, 6, 80, 1088, 9744, 165568, 4055152, 147762240, 7887576208, 624224888096, 72861217834416, 12595738987019680, 3224446583629649792, 1224344356792821362688, 689079095818717776787184

Offset

1,2

Comments

Diagonal of A275142.

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

Some solutions for n=5
..0..1..2..0..1. .0..1..2..1..0. .0..1..2..1..0. .0..1..2..1..0
..2..0..1..2..1. .2..0..1..0..1. .2..0..1..2..0. .2..0..1..2..1
..1..2..1..2..0. .1..0..1..2..0. .1..2..1..2..0. .1..2..1..2..0
..0..2..0..1..0. .1..2..0..2..0. .1..2..0..1..0. .0..2..0..1..0
..2..1..2..1..2. .1..0..2..1..2. .0..1..2..1..2. .2..0..2..0..2

Crossrefs

Cf. A275142.

Sequence in context: A248530 A229574 A240409 * A167570 A337564 A177776

Adjacent sequences: A275134 A275135 A275136 * A275138 A275139 A275140

Keyword

nonn

Author

R. H. Hardin, Jul 17 2016

Status

approved