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A073167 The (n!)-th composite number. 0
4, 6, 12, 36, 158, 871, 5802, 44996, 396465, 3905769, 42492571, 505638346, 6530063762, 90937897520, 1358169957289, 21652573590950, 366977865386054, 6588521300048437, 124902980656633121, 2493219952752601419, 52268714816806571926 (list; graph; refs; listen; history; text; internal format)
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

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Last modified December 3 19:39 EST 2021. Contains 349468 sequences. (Running on oeis4.)