A179222 Iterative mapping: a(1)=1, a(n)=A179216(a(n-1)).

1, 4, 9, 7, 10, 12, 14, 11, 27, 17, 125, 208, 4489, 42588

Offset: 1

Author

Will Nicholes, Jul 10 2010

Keywords

• nonn

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

• Will Nicholes, Iterative mapping of prime signatures.

Crossrefs

Cf. A179216, A179221.