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 A131427 A000108(n) preceded by n zeros. 6
 1, 0, 1, 0, 0, 2, 0, 0, 0, 5, 0, 0, 0, 0, 14, 0, 0, 0, 0, 0, 42, 0, 0, 0, 0, 0, 0, 132, 0, 0, 0, 0, 0, 0, 0, 429, 0, 0, 0, 0, 0, 0, 0, 0, 1430, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4862, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16796, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 58786, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 208012 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,6 COMMENTS Triangle given by A000004 DELTA A000012 where DELTA is the operator defined in A084938. - Philippe Deléham, Jul 12 2007 T(n,k) is the number of Dyck paths of semilength n having exactly k U=(1,1) steps. - Alois P. Heinz, Jun 09 2014 LINKS Alois P. Heinz, Rows n = 0..140, flattened FORMULA A000108(n) preceded by n zeros, as an infinite lower triangular matrix. EXAMPLE First few rows of the triangle are: 1; 0, 1; 0, 0, 2; 0, 0, 0, 5; 0, 0, 0, 0, 14; 0, 0, 0, 0, 0, 42; ... MAPLE T:= (n, k)-> `if`(k

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Last modified July 28 06:50 EDT 2021. Contains 346317 sequences. (Running on oeis4.)