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 A202639 Number of (n+2) X (n+2) binary arrays avoiding patterns 000 and 111 in rows, columns and nw-to-se diagonals. 0
 66, 530, 7432, 171362, 6324344, 386981422, 38841628112, 6372413856774, 1725107798449008, 768319633522920162 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A202647. LINKS Table of n, a(n) for n=1..10. EXAMPLE Some solutions for n=3 ..1..0..1..0..0....1..1..0..1..0....1..0..0..1..0....0..0..1..1..0 ..0..0..1..0..1....0..0..1..1..0....0..0..1..0..1....0..1..0..0..1 ..0..1..0..1..1....0..1..0..0..1....0..1..0..1..1....1..1..0..1..1 ..1..0..1..1..0....1..0..0..1..0....1..0..0..1..0....1..0..1..0..0 ..0..0..1..0..1....0..1..1..0..0....0..1..1..0..0....0..1..0..0..1 CROSSREFS Cf. A202647. Sequence in context: A063249 A106212 A155022 * A175260 A233065 A129218 Adjacent sequences: A202636 A202637 A202638 * A202640 A202641 A202642 KEYWORD nonn AUTHOR R. H. Hardin, Dec 22 2011 STATUS approved

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Last modified June 14 10:08 EDT 2024. Contains 373395 sequences. (Running on oeis4.)