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A187726 Number of (n+1)X7 binary arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors 1
3520, 46003, 641743, 9823368, 148669520, 2287444987, 35118814718, 539993233442, 8301474121906, 127642216451132, 1962496986726439, 30174249793987854, 463939440774903934, 7133234356724529920, 109676111704087494791 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A187729

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions for 3X7

..1..1..1..0..1..0..1....1..0..1..1..0..1..0....0..0..0..0..1..0..0

..0..0..1..1..1..0..1....0..0..1..1..1..1..1....0..1..0..1..1..1..1

..0..1..1..0..1..1..0....1..1..0..1..0..1..1....0..1..0..1..0..0..1

CROSSREFS

Sequence in context: A205278 A185920 A264450 * A267125 A241240 A035897

Adjacent sequences:  A187723 A187724 A187725 * A187727 A187728 A187729

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 13 2011

STATUS

approved

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Last modified January 26 01:48 EST 2020. Contains 331270 sequences. (Running on oeis4.)