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A117736
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factorial(n) - A049614(n).
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0
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0, 0, 1, 5, 20, 116, 696, 5016, 40128, 361152, 3611520, 39899520, 478794240, 6226813440, 87175388160, 1307630822400, 20922093158400, 355686731366400, 6402361164595200, 121645087867699200, 2432901757353984000
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OFFSET
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0,4
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LINKS
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Table of n, a(n) for n=0..20.
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FORMULA
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a(n) =n!- A049614(n) = A000142(n)-A049614(n).
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MATHEMATICA
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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}]
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CROSSREFS
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Cf. A034386, A117683.
Sequence in context: A167145 A020039 A207972 * A028944 A054720 A208941
Adjacent sequences: A117733 A117734 A117735 * A117737 A117738 A117739
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KEYWORD
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nonn
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AUTHOR
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Roger L. Bagula, Apr 14 2006
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EXTENSIONS
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Edited by the Assoc. Eds. of the OEIS, Jun 27 2010
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STATUS
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approved
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