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A186569 Number of (n+2)X(n+2) 0..5 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock 0
10077696, 1441, 64794, 1831246, 5762806, 7092466, 10131226, 18983086, 52102546, 250276606, 1023882766, 3333167026, 13883727886, 48468351346, 146915043406 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A186570

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Some solutions for 4X4

..0..0..5..5....0..0..0..0....4..0..0..3....4..0..0..3....4..4..3..4

..0..0..0..4....3..0..0..0....0..4..0..0....0..4..0..0....3..4..4..3

..0..0..0..0....0..3..0..0....0..0..4..0....0..0..4..0....4..3..4..4

..0..0..0..0....4..0..3..0....3..0..0..4....1..0..0..4....4..4..3..4

CROSSREFS

Sequence in context: A048938 A258443 A183670 * A186570 A250597 A016869

Adjacent sequences:  A186566 A186567 A186568 * A186570 A186571 A186572

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 23 2011

STATUS

approved

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Last modified October 17 06:54 EDT 2021. Contains 348048 sequences. (Running on oeis4.)