A069659 Largest n-digit perfect power.

9, 81, 961, 9801, 99856, 998001, 9998244, 99980001, 999950884, 9999800001, 99999515529, 999998000001, 9999995824729, 99999980000001, 999999961946176, 9999999800000001, 99999999989350756, 999999998000000001

Offset

1,1

Comments

Are there terms which are not perfect squares? In other words, when (if ever) does this differ from A061433.

Trivially, 81 is both a square and a fourth power. Assuming my program works, there are no differences in the first 1500 terms. - Hans Havermann, Aug 06 2006

Links

Table of n, a(n) for n=1..18.

Crossrefs

Cf. A061433.

Sequence in context: A068881 A104266 A061433 * A271556 A368446 A110853

Adjacent sequences: A069656 A069657 A069658 * A069660 A069661 A069662

Keyword

nonn,base

Author

Amarnath Murthy, Apr 04 2002

Extensions

More terms from Ryan Propper, Oct 10 2005

Status

approved