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A065892 Which composite number is n! ? 0

%I

%S 0,0,2,14,89,591,4364,36088,331910,3370110,37487843,453695312,

%T 5937400048,83567800394,1258987455069,20216786089860

%N Which composite number is n! ?

%e 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.

%t Table[n!-(PrimePi[n! ])-1, {n, 1, 12}]

%Y Cf. A002808, A000142

%K nonn

%O 1,3

%A _Labos Elemer_, Nov 28 2001

%E More terms from _Robert G. Wilson v_, Nov 29 2001

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Last modified July 13 17:54 EDT 2020. Contains 335689 sequences. (Running on oeis4.)