A103952 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A103952

Smallest powerful number such that a(n)-n is also powerful.

9, 27, 4, 8, 9, 214375, 8, 9, 25, 2197, 27, 16, 49, 30459375, 16, 25, 25, 27, 27, 36, 25, 49, 27, 25, 125, 27, 36, 32, 225, 6889, 32, 36, 49, 899236854961, 36, 72, 64, 1369, 64, 49, 49, 518436000667, 243, 108, 49, 289, 72, 49, 81, 675, 100, 196, 125, 81, 64, 64

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Sister sequence of a(n)-n is given by A076444.

a(110) > 10^22. - Donovan Johnson, Nov 19 2011

LINKS

Donovan Johnson, Table of n, a(n) for n = 1..109

FORMULA

a(n) = A076444(n)+n

CROSSREFS

Cf. A076444, A074954.