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A216024 Number of horizontal, vertical and diagonal neighbor colorings of the odd squares of an n X n array with new integer colors introduced in row major order 0
1, 2, 4, 371, 146327, 10311562327 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A216031

LINKS

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

EXAMPLE

Some solutions for n=4

..x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..1

..2..x..3..x....0..x..2..x....2..x..3..x....2..x..3..x....2..x..3..x

..x..3..x..4....x..1..x..0....x..3..x..0....x..4..x..2....x..1..x..4

..3..x..0..x....3..x..0..x....4..x..2..x....5..x..2..x....1..x..0..x

CROSSREFS

Sequence in context: A012557 A012562 A263959 * A247220 A012753 A012440

Adjacent sequences:  A216021 A216022 A216023 * A216025 A216026 A216027

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 30 2012

STATUS

approved

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Last modified September 27 03:21 EDT 2020. Contains 337380 sequences. (Running on oeis4.)