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A187439 Number of (n+1)X8 0..2 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors 0
24995294, 73023484028, 215547981233289, 638715674028172903, 1890619227290921101120 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 7 of A187441
LINKS
Table of n, a(n) for n=1..5.
EXAMPLE
Some solutions for 3X8
..0..0..0..0..2..1..2..1....0..0..0..0..2..2..2..2....0..0..0..0..1..2..2..2
..0..1..0..1..0..0..2..0....0..1..0..1..1..2..1..0....0..1..0..1..0..0..0..2
..0..0..0..0..2..1..0..1....0..0..0..0..0..2..2..2....0..0..0..0..2..0..2..2
CROSSREFS
Sequence in context: A257383 A186839 A206084 * A175580 A204778 A172795
Adjacent sequences: A187436 A187437 A187438 * A187440 A187441 A187442
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 10 2011
STATUS
approved

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Last modified August 18 15:26 EDT 2024. Contains 375269 sequences. (Running on oeis4.)