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A065892
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Which composite number is n! ?
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0
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0, 0, 2, 14, 89, 591, 4364, 36088, 331910, 3370110, 37487843, 453695312, 5937400048, 83567800394, 1258987455069, 20216786089860
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OFFSET
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1,3
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LINKS
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Table of n, a(n) for n=1..16.
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EXAMPLE
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n = 4: 4! = 24 is the 14th composite number [in A002808]: 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24.
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MATHEMATICA
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Table[n!-(PrimePi[n! ])-1, {n, 1, 12}]
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CROSSREFS
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Cf. A002808, A000142
Sequence in context: A348615 A189392 A235374 * A139183 A174705 A109113
Adjacent sequences: A065889 A065890 A065891 * A065893 A065894 A065895
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KEYWORD
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nonn
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AUTHOR
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Labos Elemer, Nov 28 2001
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EXTENSIONS
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More terms from Robert G. Wilson v, Nov 29 2001
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STATUS
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approved
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