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A179221 Iterative mapping: a(1)=0, a(n)=A179216(a(n-1)). 2
0, 2, 3, 6, 8, 25, 21, 24, 343, 195, 486, 5929, 35568, 1450800 (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^4)rs where p, q, r and s are distinct primes.

LINKS

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

Will Nicholes, Iterative mapping of prime signatures.

CROSSREFS

Cf. A179216, A179222.

Sequence in context: A281645 A224211 A187026 * A103964 A199790 A088329

Adjacent sequences:  A179218 A179219 A179220 * A179222 A179223 A179224

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.