A092922 - OEIS

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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

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.

KEYWORD

nonn

AUTHOR

EXTENSIONS

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

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

STATUS

approved