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 A074911 Triangle generated by Pascal's rule, except begin and end the n-th row with n!. 4
 1, 2, 2, 6, 4, 6, 24, 10, 10, 24, 120, 34, 20, 34, 120, 720, 154, 54, 54, 154, 720, 5040, 874, 208, 108, 208, 874, 5040, 40320, 5914, 1082, 316, 316, 1082, 5914, 40320, 362880, 46234, 6996, 1398, 632, 1398, 6996, 46234, 362880 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Reinhard Zumkeller, Rows n = 1..100 of table, flattened EXAMPLE Triangle begins: 1; 2, 2; 6, 4, 6; 24, 10, 10, 24; 120, 34, 20, 34, 120; 720, 154, 54, 54, 154, 720; 5040, 874, 208, 108, 208, 874, 5040; PROG (PARI) t(n, k) = {if (k<1 || k>n, return (0)); if (k==1 || k==n, return (n!)); return (t(n-1, k-1) + t(n-1, k)); } tabl(nn) = {for (n=1, nn, for (k=1, n, print1(t(n, k), ", "); ); print(); ); } \\ Michel Marcus, May 19 2013 (Haskell) a074911 n k = a074911_tabl !! (n-1) !! (k-1) a074911_row n = a074911_tabl !! (n-1) a074911_tabl = map fst \$ iterate    (\(vs, w:ws) -> (zipWith (+) ([w] ++ vs) (vs ++ [w]), ws))    ([1], tail a001563_list) -- Reinhard Zumkeller, Aug 05 2013 CROSSREFS Cf. A227550, A225621 (central terms). Sequence in context: A249796 A182411 A067804 * A174222 A071059 A256468 Adjacent sequences:  A074908 A074909 A074910 * A074912 A074913 A074914 KEYWORD easy,nonn,tabl AUTHOR Joseph L. Pe, Oct 01 2002 EXTENSIONS More terms from Michel Marcus, May 19 2013 STATUS approved

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Last modified October 17 14:31 EDT 2019. Contains 328114 sequences. (Running on oeis4.)