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 A104981 Column 1 of triangle A104980; also equals column 0 of triangle A104986, which equals the matrix logarithm of A104980. 5
 0, 1, 2, 7, 33, 191, 1297, 10063, 87669, 847015, 8989301, 103996703, 1303132269, 17589153719, 254509227541, 3931158238735, 64573130459613, 1124144767682215, 20677664894412965, 400760695386194687, 8163539437728923181 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS FORMULA From Gary W. Adamson, Jul 14 2011: Let M = triangle A128175 as an infinite square production matrix: (deleting the first "1"): 1, 1, 0, 0, 0,... 2, 2, 1, 0, 0,... 4, 4, 3, 1, 0,... 8, 8, 7, 4, 1,... ... a(n) = sum of top row terms of M^(n-1).  Example: top row of M^4 = (71, 71, 38, 10, 1), sum = 191 = a(5). (End) a(0) = 1, a(n) = n * a(n-1) + Sum_{j=1..n} A003319(j) * a(n - j), with offset 0 for the term 1. - F. Chapoton, Feb 26 2018 MATHEMATICA T[n_, k_] := T[n, k] = If[n

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Last modified October 15 12:31 EDT 2019. Contains 328026 sequences. (Running on oeis4.)