A209458 Number of n X n 0..6 arrays with every 2X2 subblock containing exactly one value repeat, and new values 0..6 introduced in row major order

1, 6, 2027, 26142922, 9920302864598, 61881181615562063430

Offset

1,2

Comments

Diagonal of A209465

Links

Table of n, a(n) for n=1..6.

Example

Some.solutions.for.n=4
..0..0..1..0....0..0..1..0....0..1..0..0....0..0..1..0....0..0..0..0
..1..2..0..2....1..2..0..3....0..2..1..2....1..2..0..2....1..2..1..2
..3..2..1..1....0..0..1..0....0..1..3..1....1..3..3..0....0..2..3..1
..0..2..3..4....1..2..0..2....0..2..2..2....0..0..1..0....0..1..1..4

Crossrefs

Sequence in context: A094036 A053293 A209737 * A209520 A279440 A004817

Adjacent sequences: A209455 A209456 A209457 * A209459 A209460 A209461

Keyword

nonn

Author

R. H. Hardin Mar 09 2012

Status

approved