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A063631 Smallest power of 9 having just n 5's in its decimal representation. 0
1, 4, 13, 23, 20, 46, 52, 35, 37, 68, 80, 103, 106, 91, 115, 138, 123, 148, 152, 137, 166, 170, 156, 199, 182, 188, 222, 225, 237, 200, 294, 292, 247, 288, 272, 289, 278, 314, 327, 328, 402, 363, 269, 312, 374, 413, 372, 407, 399, 444, 411 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

MATHEMATICA

a = {}; Do[k = 1; While[ Count[ IntegerDigits[9^k], 5] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a

CROSSREFS

Sequence in context: A052218 A183148 A202089 * A031240 A031320 A112263

Adjacent sequences:  A063628 A063629 A063630 * A063632 A063633 A063634

KEYWORD

base,nonn

AUTHOR

Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 10 2001

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Last modified February 17 09:30 EST 2012. Contains 206009 sequences.