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A181254 Number of (n+2)X(k+2) binary matrices with every 3X3 block having exactly four 1's 0
126, 746, 3190, 10818, 41374, 133850, 386406, 1297322, 3873790, 10724850 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A181262

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for 4X4

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

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

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

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

CROSSREFS

Sequence in context: A186825 A186817 A107658 * A004008 A292981 A126170

Adjacent sequences:  A181251 A181252 A181253 * A181255 A181256 A181257

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 10 2010

STATUS

approved

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Last modified January 19 22:12 EST 2022. Contains 350466 sequences. (Running on oeis4.)