A063632 - OEIS

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A063632

Smallest k such that 9^k has exactly n 6's in its decimal representation.

1, 7, 4, 20, 26, 24, 39, 17, 59, 65, 72, 97, 69, 121, 141, 104, 125, 136, 132, 147, 144, 163, 179, 161, 177, 184, 208, 191, 257, 193, 262, 281, 294, 267, 318, 334, 297, 347, 319, 310, 369, 315, 365, 349, 399, 387, 383, 414, 373, 408, 434

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OFFSET

0,2

LINKS

Table of n, a(n) for n=0..50.

MATHEMATICA

a = {}; Do[k = 1; While[ Count[ IntegerDigits[9^k], 6] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a

Join[{1}, With[{k6=DigitCount[9^Range[0, 500], 10, 6]}, Flatten[Table[Position[k6, n, 1, 1], {n, 50}]]]-1] (* Harvey P. Dale, Jun 11 2024 *)

CROSSREFS

Sequence in context: A181138 A279942 A279998 * A147601 A075536 A280336

Adjacent sequences: A063629 A063630 A063631 * A063633 A063634 A063635

KEYWORD

base,nonn

AUTHOR

Robert G. Wilson v, Aug 10 2001

EXTENSIONS

Name corrected by Jon E. Schoenfield, Jun 26 2018

STATUS

approved