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A188310 Number of (n+1)X9 binary arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums 0
11828, 1694376, 77627954, 4280848766, 228625683370 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 8 of A188311

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for 3X9

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

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

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

CROSSREFS

Sequence in context: A071519 A294661 A347144 * A185496 A249842 A251788

Adjacent sequences:  A188307 A188308 A188309 * A188311 A188312 A188313

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 27 2011

STATUS

approved

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Last modified November 27 07:28 EST 2021. Contains 349365 sequences. (Running on oeis4.)