A092922 a(1) = prime(1), a(2) = prime(prime( a(1) )), a(3) = prime(prime(prime( a(2) ))), a(4) = prime(prime(prime(prime( a(3) )))), etc.

2, 5, 127, 648391, 2428095424619, 75063692618249, 2586559730396077, 98552043847093519

Offset

1,1

Links

Table of n, a(n) for n=1..8.

A. Booker, The Nth Prime Page

Maple

ithprime(1); ithprime(ithprime(%)); ithprime(ithprime(ithprime(%))); ithprime(ithprime(ithprime(ithprime(%))));

Mathematica

a[1] = 2; a[n_] := Nest[Prime, a[n - 1], n]; Table[ a[n], {n, 5}] (* Robert G. Wilson v, Dec 24 2004 *)

Crossrefs

Cf. A007097, the primeth recurrence.

Sequence in context: A270588 A214648 A175978 * A093865 A139484 A088271

Adjacent sequences: A092919 A092920 A092921 * A092923 A092924 A092925

Keyword

nonn

Author

Jorge Coveiro, Apr 17 2004

Extensions

a(5) from Robert G. Wilson v, Dec 24 2004

a(6)-a(8) from Zak Seidov, Sep 04 2016

Status

approved