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A179222 Iterative mapping: a(1)=1, a(n)=A179216(a(n-1)). 2
1, 4, 9, 7, 10, 12, 14, 11, 27, 17, 125, 208, 4489, 42588 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(15) is greater than 10^7 and of the form (p^5)(q^5)(r^2) where p, q and r are distinct primes.

LINKS

Table of n, a(n) for n=1..14.

Will Nicholes, Iterative mapping of prime signatures.

CROSSREFS

Cf. A179216, A179221.

Sequence in context: A004159 A092554 A155787 * A123157 A154684 A256174

Adjacent sequences:  A179219 A179220 A179221 * A179223 A179224 A179225

KEYWORD

nonn

AUTHOR

Will Nicholes, Jul 10 2010

STATUS

approved

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Last modified September 24 04:27 EDT 2017. Contains 292403 sequences.