OFFSET
0,2
MATHEMATICA
a = {}; Do[k = 1; While[ Count[ IntegerDigits[7^k], 1] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a
Table[Position[DigitCount[7^Range[600], 10, 1], n, 1, 1], {n, 0, 50}]//Flatten (* Harvey P. Dale, Jan 12 2019 *)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Robert G. Wilson v, Aug 10 2001
EXTENSIONS
Name corrected by Jon E. Schoenfield, Jun 26 2018
STATUS
approved