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A090561 Least n-th power that begins with k^(n-1) for some k > 1. 1
1, 4, 64, 81, 16807, 1000000, 10000000, 100000000, 1000000000, 10000000000, 100000000000, 1000000000000, 10000000000000, 100000000000000, 1000000000000000, 10000000000000000, 100000000000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = 10^n for 6 <= n <= 500 (I haven't checked past 500.) - David Wasserman, Jan 05 2006

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

a(1) = 1 because 1 begins with 2^0. a(5) = 16807 because 16807 begins with 2^4.

CROSSREFS

Cf. A090568.

Cf. A067442.

Sequence in context: A213545 A111444 A210935 * A273375 A016934 A260182

Adjacent sequences:  A090558 A090559 A090560 * A090562 A090563 A090564

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Dec 11 2003

EXTENSIONS

Corrected and extended by David Wasserman, Jan 05 2006

STATUS

approved

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Last modified June 14 02:36 EDT 2021. Contains 345016 sequences. (Running on oeis4.)