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A186936 Number of (n+1)X7 binary arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces 1
1000, 27272, 241320, 2504264, 25314744, 264604776, 2731872328, 28477050608, 295182600552, 3063267862112, 31785328427832, 329995464895168, 3425533459997032, 35554512231460224, 369074247549339088 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A186939

LINKS

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

EXAMPLE

Some solutions for 4X7

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

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

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

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

CROSSREFS

Sequence in context: A277397 A250449 A117690 * A185747 A234787 A029799

Adjacent sequences:  A186933 A186934 A186935 * A186937 A186938 A186939

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 01 2011

STATUS

approved

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Last modified December 5 17:28 EST 2021. Contains 349557 sequences. (Running on oeis4.)