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 A184539 Number of (n+2)X(n+2) binary arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order 1
 45, 193, 631, 1837, 5313, 16345, 54543, 194245, 719905, 2725367, 10430675, 40158073, 155173369, 601154073, 2333701711, 9075257125, 35345417073, 137846719279, 538258108483, 2104099248441, 8233431070825, 32247604093423 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A184548 LINKS R. H. Hardin, Table of n, a(n) for n = 1..68 EXAMPLE Some solutions for 4X4 ..0..0..1..1....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..1 ..0..0..1..1....0..0..0..1....0..0..0..0....0..0..0..1....0..1..1..1 ..1..1..0..1....0..0..1..1....0..0..1..1....0..0..0..1....0..1..1..1 ..1..1..0..1....0..0..1..1....1..1..0..0....0..0..0..1....0..1..1..1 CROSSREFS Sequence in context: A158630 A158634 A091197 * A146302 A203835 A087442 Adjacent sequences:  A184536 A184537 A184538 * A184540 A184541 A184542 KEYWORD nonn AUTHOR R. H. Hardin Jan 16 2011 STATUS approved

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Last modified August 12 16:17 EDT 2020. Contains 336439 sequences. (Running on oeis4.)