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A186557 Number of (n+1)X5 0..3 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors 4
927477, 783375343, 663296784123, 561714653720250, 475681559860717916, 402827283017904807331, 341131017852900112413067, 288884064380556803805427879, 244639147969972250796140260427 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A186558

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..13

EXAMPLE

Some solutions for 3X5

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

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

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

CROSSREFS

Sequence in context: A345623 A346341 A115172 * A136924 A029818 A130672

Adjacent sequences: A186554 A186555 A186556 * A186558 A186559 A186560

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 23 2011

STATUS

approved

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Last modified December 5 12:42 EST 2022. Contains 358586 sequences. (Running on oeis4.)