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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 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.)