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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. 0
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.
Sequence in context: A270588 A214648 A175978 * A093865 A139484 A088271
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

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Last modified April 13 22:20 EDT 2024. Contains 371646 sequences. (Running on oeis4.)