A179224 - OEIS

A179224

Iterative mapping with offset: a(1)=200662, a(n)=A095904(a(n-1)-1).

200662, 4691, 8520, 1183, 904, 191, 71, 52, 56, 31, 22, 17, 121, 53, 66, 48, 33, 28, 24, 21, 16, 13, 14, 27, 81, 38, 361, 3844, 2392, 10032, 3910, 20790

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OFFSET

1,1

COMMENTS

a(33) is greater than 10^10 and of the form (p^7)(q^4), where p and q are distinct primes. Of the sequences of type a(n)=A095904(a(n-1)-1), this one has an exceptionally high number of terms under 1000. It is unknown if this sequence continues indefinitely in both directions, is part of a loop, or is part of the sequence A179223.

LINKS

Table of n, a(n) for n=1..32.

Will Nicholes, Iterative mapping of prime signatures.

CROSSREFS

Cf. A095904, A179223.

Sequence in context: A346350 A345661 A363167 * A237374 A202316 A186958

Adjacent sequences: A179221 A179222 A179223 * A179225 A179226 A179227

KEYWORD

nonn

AUTHOR

Will Nicholes, Jul 10 2010

STATUS

approved