A063572 Smallest power of 9 having n in its decimal representation.

5, 2, 3, 6, 5, 4, 4, 3, 2, 1, 11, 15, 18, 11, 6, 18, 17, 19, 13, 23, 9, 8, 14, 21, 12, 13, 26, 28, 12, 3, 8, 6, 13, 24, 10, 18, 12, 27, 9, 27, 10, 6, 9, 8, 6, 14, 8, 7, 9, 5, 18, 16, 18, 6, 13, 35, 4, 20, 13, 5, 11, 4, 23, 18, 12, 4, 17, 8, 24, 7, 22, 17, 3

Offset

0,1

Comments

Variant of A062526. - R. J. Mathar, Dec 15 2008

Links

Table of n, a(n) for n=0..72.

Mathematica

a = {}; Do[k = 1; While[ StringPosition[ ToString[9^k], ToString[n] ] == {}, k++ ]; a = Append[a, k], {n, 0, 60} ]; a

Prog

(Python)
def a(n):
  target, k, pow9 = str(n), 1, 9
  while not target in str(pow9): k, pow9 = k+1, pow9*9
  return k
print([a(n) for n in range(73)]) # Michael S. Branicky, May 02 2021

Crossrefs

Sequence in context: A229780 A272031 A090183 * A205294 A372806 A131567

Adjacent sequences: A063569 A063570 A063571 * A063573 A063574 A063575

Keyword

nonn,base

Author

Robert G. Wilson v, Aug 10 2001

Extensions

More terms from Michael S. Branicky, May 02 2021

Status

approved