A179226 Iterative mapping with offset: a(1)=1927639, a(n)=A179216(a(n-1)-1).

1927639, 48828, 2069, 735, 664, 118, 46, 36, 19, 15, 11, 12, 27, 169, 57, 100, 279841

Offset: 1

Author

Will Nicholes, Jul 10 2010

Keywords

• nonn

Comments

a(18) is greater than 10^8 and of the form (p^16)qr, where p, q and r are distinct primes. Of the sequences of type a(n) = A179216(a(n-1)-1), this contains the smallest integer (11) that is part of an unknown sequence type (i.e. it is unknown if this sequence continues indefinitely in both directions, is part of a loop, or is part of the sequence A179225.)

Links

• Will Nicholes, Iterative mapping of prime signatures.

Crossrefs

Cf. A179216, A179225.