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A186590 Number of (n+3)X(n+3) 0..3 arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock 0
4294967296, 2703, 33006, 2526165, 11494293, 16898709, 17395749, 20385141, 27395301, 42268437, 70928997, 139324629, 471686661, 1278076821, 2789296725 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A186599

LINKS

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

EXAMPLE

Some solutions for 5X5

..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..3..3

..2..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..2

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

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

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

CROSSREFS

Sequence in context: A198161 A244064 A255344 * A186599 A186591 A281576

Adjacent sequences:  A186587 A186588 A186589 * A186591 A186592 A186593

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 24 2011

STATUS

approved

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Last modified October 18 10:28 EDT 2017. Contains 293507 sequences.