A111450 Least perfect power ending in n. 0 if no perfect power ends in n. e.g. a(10) = a(15) = 0.

1, 32, 243, 4, 25, 16, 27, 8, 9, 0, 357911, 512, 4913, 0, 0, 16, 389017, 0, 59319, 0, 121, 0, 103823, 324, 25, 0, 27, 128, 529, 0, 1331, 32, 456533, 0, 0, 36, 35937, 0, 493039, 0, 441, 0, 243, 144, 0, 0, 177147, 2048, 49, 0, 132651, 21952, 50653, 0, 0, 256, 804357, 0

Offset

1,2

Comments

a(10^n) =0 = a(10k+5),if 10k + 5 is not==0 (mod 25). Are there any other numbers r such that a(r) =0?

Links

Table of n, a(n) for n=1..58.

Example

a(14) = 0 because any number ending in 14 is even but not divisible by 4 and any even power is divisible by 4. [From David Wasserman, Jan 15 2009]

Crossrefs

Sequence in context: A060622 A118999 A321829 * A351193 A070332 A111442

Adjacent sequences: A111447 A111448 A111449 * A111451 A111452 A111453

Keyword

base,nonn

Author

Amarnath Murthy, Aug 03 2005

Extensions

Corrected and extended by David Wasserman, Jan 15 2009

Status

approved