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 A117736 factorial(n) - A049614(n). 0
 0, 0, 1, 5, 20, 116, 696, 5016, 40128, 361152, 3611520, 39899520, 478794240, 6226813440, 87175388160, 1307630822400, 20922093158400, 355686731366400, 6402361164595200, 121645087867699200, 2432901757353984000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 LINKS FORMULA a(n) =n!- A049614(n) = A000142(n)-A049614(n). MATHEMATICA f[n_] := If[PrimeQ[n] == True, 1, n] cf[0] = 1; cf[n_Integer?Positive] := cf[n] = f[n]*cf[n - 1] g[n_] := If[PrimeQ[n] == True, n, 1] p[0] = 1; p[n_Integer?Positive] := p[n] = g[n]*p[n - 1] Table[n! - cf[n], {n, 0, 20}] CROSSREFS Cf. A034386, A117683. Sequence in context: A020039 A319489 A207972 * A258665 A028944 A332710 Adjacent sequences:  A117733 A117734 A117735 * A117737 A117738 A117739 KEYWORD nonn AUTHOR Roger L. Bagula, Apr 14 2006 EXTENSIONS Edited by the Assoc. Eds. of the OEIS, Jun 27 2010 STATUS approved

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Last modified November 29 08:38 EST 2020. Contains 338762 sequences. (Running on oeis4.)