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A185496 Number of (n+1)X9 binary arrays with every 2X2 subblock sum equal to some horizontal or vertical neighbor 2X2 subblock sum 0
11828, 3480976, 504455124, 85864759616, 14183811777874, 2389300393136984 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 8 of A185497

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for 4X9

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

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

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

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

CROSSREFS

Sequence in context: A294661 A347144 A188310 * A249842 A251788 A194776

Adjacent sequences:  A185493 A185494 A185495 * A185497 A185498 A185499

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 29 2011

STATUS

approved

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Last modified November 27 15:36 EST 2021. Contains 349394 sequences. (Running on oeis4.)