A143716 (0, 1, 2, 3, 2^2, 5, 2*3, 7, 2^3, 3^2, 2*5, 11, 2^2*3,..) becomes (1, 2, 3, 4, 5^6, 7, 8*9, 10, 11^12, 13^14, 15*16, 17, 18^19*20,..).

1, 2, 3, 4, 15625, 7, 72, 10, 313842837672, 393737638569928, 240, 17, 14164706907106753527152640

Offset

1,2

Comments

The list of the bases and exponents of the prime factorizations is replaced by the list of positive integers, but the operations stay fixed. - R. J. Mathar, Mar 22 2016

Links

Table of n, a(n) for n=1..13.

Example

a(5)=5^6=15625.
a(6)=7.
a(7)=8*9=72.

Crossrefs

Cf. A141287, A141261, A136611.

Sequence in context: A120024 A062929 A038105 * A228311 A258107 A307256

Adjacent sequences: A143713 A143714 A143715 * A143717 A143718 A143719

Keyword

nonn

Author

Juri-Stepan Gerasimov, Nov 13 2008

Extensions

Definition and terms corrected. - R. J. Mathar, Mar 22 2016

Status

approved