A069647 a(1) = 1; for n > 1, the smallest n-th power with the digit sum also a nontrivial n-th power, i.e., 10^n is not a member.

1, 4, 8, 14641, 229345007, 9474296896, 886899938586555644327, 1968149944695589999318735995870695144816896, 29733387998758905886191953999849859976998299361889769463896694547608377966796875

Offset: 1

Author

Amarnath Murthy, Apr 04 2002

Keywords

• hard
• nonn
• base

Comments

Are there members with digit sum other than 2^n?

Examples

			a(4) = 14641 because 14641 is 11^4 and its digit sum is 16, which is 2^4.
		

Crossrefs

Cf. A069648.

Extensions

Corrected and extended by David Wasserman, Apr 23 2003