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Search: id:A092922
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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
1
2, 5, 127, 648391, 2428095424619 (list; graph; listen)
OFFSET

1,1

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}] (from Robert G. Wilson v Dec 24 2004)

CROSSREFS

Cf. A007097, the primeth recurrence.

Sequence in context: A041237 A015172 A132526 this_sequence A093865 A139484 A088271

Adjacent sequences: A092919 A092920 A092921 this_sequence A092923 A092924 A092925

KEYWORD

nonn

AUTHOR

Jorge Coveiro (jorgecoveiro(AT)yahoo.com), Apr 17 2004

EXTENSIONS

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

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.


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