A136740 (0, 1, 2, 3, 2^2, 5, 2*3, 7, 2^3, 3^2, 2*5, 11, 2^2*3,..) becomes (2, 3, 5, 7, 11^13, 17, 19*23, 29, 31^37, 41^43, 47*53, 59, 61^67*71,..).

2, 3, 5, 7, 34522712143931, 17, 437, 29

Offset

1,1

Links

Table of n, a(n) for n=1..8.

Example

a(5)=11^13=34522712142931.
a(7)=19*23=437,
etc.

Crossrefs

Cf. A141269, A141270, A143652, A143653, A143666.

Sequence in context: A288715 A208361 A145380 * A105994 A120496 A105150

Adjacent sequences: A136737 A136738 A136739 * A136741 A136742 A136743

Keyword

nonn,less

Author

Juri-Stepan Gerasimov, Nov 08 2008

Extensions

Corrected typo in a(5), inserted a(6). R. J. Mathar, Feb 21 2009

Status

approved