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A187440
Number of (n+1)X9 0..2 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors
0
206705746, 1606497082565, 12634446300216814, 99822247953081225350, 787665007015732116012615
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 8 of A187441
LINKS
Table of n, a(n) for n=1..5.
EXAMPLE
Some solutions for 3X9
..0..1..0..1..0..2..0..1..2....0..1..0..1..0..1..0..2..0
..0..0..0..0..0..1..1..1..2....0..0..0..0..0..1..2..1..1
..0..1..0..1..0..0..2..1..0....0..1..0..1..0..2..0..1..2
CROSSREFS
Sequence in context: A034641 A288088 A233493 * A092379 A233614 A105294
Adjacent sequences: A187437 A187438 A187439 * A187441 A187442 A187443
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 10 2011
STATUS
approved

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Last modified October 1 00:03 EDT 2024. Contains 376365 sequences.
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