A275559 Number of n X n 0..2 arrays with no element equal to any value at offset (-2,0), (-1,2) or (0,-2) and new values introduced in order 0..2.

1, 14, 126, 1176, 13104, 221184, 5360184, 188294424, 9859695270, 753451571736, 86203713522030, 14475271269137334

Offset

1,2

Comments

Diagonal of A275565.

Links

Table of n, a(n) for n=1..12.

Example

Some solutions for n=4
..0..0..1..2. .0..0..1..2. .0..0..1..2. .0..0..1..2. .0..0..1..2
..2..0..1..1. .0..1..2..0. .0..1..1..2. .0..0..2..2. .0..1..2..2
..2..2..0..1. .1..2..0..1. .2..1..0..0. .1..1..2..0. .1..1..0..0
..1..2..0..0. .1..2..0..1. .2..2..0..1. .1..1..0..0. .1..2..0..1

Crossrefs

Cf. A275565.

Sequence in context: A088625 A073393 A020918 * A222477 A041368 A026882

Adjacent sequences: A275556 A275557 A275558 * A275560 A275561 A275562

Keyword

nonn

Author

R. H. Hardin, Aug 01 2016

Status

approved