OFFSET
1,2
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1001
MATHEMATICA
Rest[Flatten[Position[Flatten[IntegerDigits[#, 7]&/@Range[0, 200]], 0]]]-1 (* Harvey P. Dale, Oct 10 2011 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
EXTENSIONS
Missing a(1)=0 inserted by Sean A. Irvine, Apr 10 2020
STATUS
approved