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A063594 Smallest power of 5 having just n 9's in its decimal representation. 1
1, 8, 17, 23, 58, 59, 40, 57, 74, 92, 93, 114, 112, 143, 155, 156, 160, 193, 113, 195, 212, 214, 215, 236, 216, 287, 291, 295, 309, 289, 288, 360, 274, 371, 427, 418, 444, 462, 478, 464, 466, 494, 530, 545, 482, 561, 481, 597, 644, 689, 650 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Harry J. Smith, Table of n, a(n) for n=0,...,150

MATHEMATICA

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

PROG

(PARI) Count(x, d)= { local(c, f); c=0; while (x>9, f=x-10*(x\10); if (f==d, c++); x\=10); if (x==d, c++); return(c) } { for (n=0, 150, a=1; while (Count(5^a, 9) != n, a++); write("b063594.txt", n, " ", a) ) } [From Harry J. Smith, Aug 26 2009]

CROSSREFS

Sequence in context: A088488 A031458 A044991 * A110474 A118066 A044060

Adjacent sequences:  A063591 A063592 A063593 * A063595 A063596 A063597

KEYWORD

base,nonn

AUTHOR

Robert G. Wilson v, Aug 10 2001

STATUS

approved

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Last modified December 15 03:08 EST 2017. Contains 296020 sequences.