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A140319 a(1)=2, a(2)=3^2, a(n+1)=Pn^a(n), being Pn the nth-prime number. +0
1
2, 9, 1953125 (list; graph; listen)
OFFSET

0,1

COMMENT

Exponential primorial.

The next term is too large to include.

EXAMPLE

a(1)=2

a(2)=3^2=9

a(3)=5^9=1953125

MAPLE

P:=proc(n) local a, i; a:=2; print(a); for i from 2 by 1 to n do a:=ithprime(i)^a; print(a); od; end: P(5);

CROSSREFS

Cf. A002110, A049384, A139802.

Sequence in context: A049384 A132859 A103562 this_sequence A120314 A050924 A096877

Adjacent sequences: A140316 A140317 A140318 this_sequence A140320 A140321 A140322

KEYWORD

easy,nonn,bref

AUTHOR

Paolo P. Lava & Giorgio Balzarotti (ppl(AT)spl.at), May 26 2008

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Last modified September 7 23:08 EDT 2008. Contains 143486 sequences.


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