A179221 Iterative mapping: a(1)=0, a(n)=A179216(a(n-1)).

0, 2, 3, 6, 8, 25, 21, 24, 343, 195, 486, 5929, 35568, 1450800

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^4)rs where p, q, r and s are distinct primes.

Links

• Will Nicholes, Iterative mapping of prime signatures.

Crossrefs

Cf. A179216, A179222.