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 A205256 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally, and new values 0..1 introduced in row major order 0
 240, 26185, 10529929, 15472955417, 83226275730613, 1640204498026982975, 118390237532638666425606, 31296002786422594003958101231 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A205264 LINKS Table of n, a(n) for n=1..8. EXAMPLE Some solutions for n=3 ..0..1..1..1..1....0..1..0..0..1....0..0..1..0..1....0..0..1..0..0 ..1..1..1..1..1....1..1..1..0..0....0..1..1..0..1....1..1..1..1..1 ..1..0..1..0..1....1..0..1..1..0....0..0..0..0..0....1..0..0..0..0 ..1..1..1..0..1....0..1..1..1..0....1..0..0..1..0....1..1..1..1..0 ..0..1..0..0..0....1..0..1..0..1....1..1..1..0..0....0..1..0..0..1 CROSSREFS Sequence in context: A338562 A342990 A342306 * A110163 A323981 A258082 Adjacent sequences: A205253 A205254 A205255 * A205257 A205258 A205259 KEYWORD nonn AUTHOR R. H. Hardin Jan 24 2012 STATUS approved

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Last modified May 20 08:05 EDT 2024. Contains 372703 sequences. (Running on oeis4.)