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A098175 Smallest power of n with initial digit = 1 in decimal representation. 2
1, 16, 19683, 16, 125, 1296, 16807, 16777216, 1853020188851841, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 160000, 194481, 10648, 12167, 13824, 15625, 17576, 19683, 17210368, 17249876309, 19683000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A000030(a(n)) = 1; a(n) = n^A098174(n).

LINKS

Table of n, a(n) for n=1..30.

MATHEMATICA

f[n_] := Block[{k = 1}, While[IntegerDigits[n^k][[1]] != 1, k++ ]; n^k]; Table[ f[n], {n, 30}] (* Robert G. Wilson v, Sep 01 2004 *)

CROSSREFS

Sequence in context: A288957 A159387 A283720 * A089232 A002489 A060205

Adjacent sequences:  A098172 A098173 A098174 * A098176 A098177 A098178

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Aug 30 2004

STATUS

approved

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Last modified February 18 02:09 EST 2018. Contains 299297 sequences. (Running on oeis4.)