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A231102 Number of n X n 0..3 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero 0
0, 0, 8, 438, 75346, 48463174, 110728004898, 879549454424322, 24425156030389837162, 2380336656518678938694450, 814656324267500393611361701060 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Diagonal of A231108

LINKS

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

EXAMPLE

Some solutions for n=4

..0..1..2..3....0..1..0..1....0..1..2..1....0..1..2..1....0..1..2..0

..0..1..0..3....2..3..2..3....0..3..2..3....2..3..0..2....0..3..1..2

..2..3..0..3....0..1..0..1....0..1..0..3....1..2..3..2....1..2..3..2

..2..1..0..3....2..3..2..1....0..1..2..1....1..0..1..0....1..0..3..2

CROSSREFS

Sequence in context: A186419 A007701 A101356 * A231824 A069442 A215527

Adjacent sequences:  A231099 A231100 A231101 * A231103 A231104 A231105

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 03 2013

STATUS

approved

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Last modified October 26 04:45 EDT 2021. Contains 348256 sequences. (Running on oeis4.)