A073167 The (n!)-th composite number.

4, 6, 12, 36, 158, 871, 5802, 44996, 396465, 3905769, 42492571, 505638346, 6530063762, 90937897520, 1358169957289, 21652573590950, 366977865386054, 6588521300048437, 124902980656633121, 2493219952752601419, 52268714816806571926

Offset

1,1

Links

Table of n, a(n) for n=1..21.

Formula

a(n) = A002808(A000142(n)) for n >= 1. - Altug Alkan, Apr 21 2018

Mathematica

c[n_] := FixedPoint[ n + PrimePi[ # ]+1&, n] Table[ c[n! ], {n, 1, 16}]

Crossrefs

Cf. A000142, A002808.

Sequence in context: A081198 A275978 A242211 * A060202 A062624 A154666

Adjacent sequences: A073164 A073165 A073166 * A073168 A073169 A073170

Keyword

nonn

Author

Labos Elemer, Jul 19 2002

Extensions

Extended by Robert G. Wilson v, Jul 20 2002

a(17)-a(21) from Chai Wah Wu, Apr 21 2018

Status

approved