A276292 Number of n X n 0..2 arrays with no element equal to any value at offset (-2,-1), (-1,1) or (0,-1) and new values introduced in order 0..2.

1, 4, 45, 1017, 50949, 4988145, 1073114625, 456837553545, 427500156271073, 794420496019076757, 3247016064162495298253

Offset

1,2

Comments

Diagonal of A276299.

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Cf. A276299.

Sequence in context: A360344 A197989 A338456 * A174484 A158887 A126452

Adjacent sequences: A276289 A276290 A276291 * A276293 A276294 A276295

Keyword

nonn

Author

R. H. Hardin, Aug 28 2016

Status

approved