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 A134634 Triangle formed by Pascal's rule with left borders = A000108. 2
 1, 1, 1, 2, 2, 2, 5, 4, 4, 5, 14, 9, 8, 9, 14, 42, 23, 17, 17, 23, 42, 132, 65, 40, 34, 40, 65, 132, 429, 197, 105, 74, 74, 105, 197, 429, 1430, 626, 302, 179, 148, 179, 302, 626, 1430, 4862, 2056, 928, 481, 327, 327, 481, 928, 2056, 4862, 16796, 6918, 2984, 1409, 808, 654, 808, 1409, 2984, 6918, 16796, 58786, 23714, 9902, 4393, 2217, 1462, 1462, 2217, 4393, 9902, 23714, 58786 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 COMMENTS Row sums = A134635: (1, 2, 6, 18, 54, 164, ...). LINKS FORMULA Triangle, given right and left borders consist of the Catalan sequence, A000108; then T(n,k) = T(n-1,k) + T(n-1,k-1). EXAMPLE First few rows of the triangle: 1; 1, 1; 2, 2, 2; 5, 4, 4, 5; 14, 9, 8, 9, 14; 42, 23, 17, 17, 23, 42; 132, 65, 40, 34, 40, 65, 132; ... CROSSREFS Cf. A000108, A134635, A222403, A222404, A222405. Sequence in context: A209558 A209772 A147293 * A346500 A103286 A285704 Adjacent sequences: A134631 A134632 A134633 * A134635 A134636 A134637 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, Nov 04 2007 EXTENSIONS Recomputed by N. J. A. Sloane, Feb 18 2013 STATUS approved

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Last modified December 6 01:03 EST 2022. Contains 358594 sequences. (Running on oeis4.)