OFFSET
0,2
LINKS
Harvey P. Dale, Table of n, a(n) for n = 0..1000
MATHEMATICA
a = {}; Do[k = 1; While[ Count[ IntegerDigits[6^k], 5] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a
Join[{1}, With[{c6=DigitCount[#, 10, 5]&/@(6^Range[600])}, Flatten[Table[ Position[ c6, n, 1, 1], {n, 51}]]]] (* Harvey P. Dale, May 17 2018 *)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Robert G. Wilson v, Aug 10 2001
EXTENSIONS
Name corrected by Jon E. Schoenfield, Jun 26 2018
STATUS
approved