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 A194781 Number of lower triangles of a (2n+1)X(2n+1) 0..n array with new values introduced in row major order 0..n and no element unequal to more than one horizontal or vertical neighbor 0
 6, 41, 265, 1736, 11857, 85007, 639753, 5045602, 41615156, 358185389, 3210667479, 29914284821, 289187621887 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 3 of A194778 LINKS EXAMPLE Some solutions for n=2 containing a 2 ..0..........0..........0..........0..........0..........0..........0 ..1.1........1.1........1.1........0.0........1.1........1.1........0.1 ..1.1.2......1.1.1......1.1.1......1.1.1......1.1.1......1.1.2......0.1.1 ..1.1.2.2....1.1.1.1....1.1.1.2....1.1.1.1....2.2.2.2....1.1.2.2....0.1.1.1 ..1.1.2.2.1..2.2.2.2.2..1.1.1.2.2..1.1.1.1.2..2.2.2.2.0..1.1.2.2.0..0.1.1.1.2 CROSSREFS Sequence in context: A198795 A320090 A266425 * A323969 A252980 A274997 Adjacent sequences: A194778 A194779 A194780 * A194782 A194783 A194784 KEYWORD nonn AUTHOR R. H. Hardin Sep 02 2011 STATUS approved

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Last modified December 4 23:46 EST 2022. Contains 358572 sequences. (Running on oeis4.)