login
A081608
Number of numbers <= n having no 0 in their ternary representation.
6
0, 1, 2, 2, 3, 4, 4, 5, 6, 6, 6, 6, 6, 7, 8, 8, 9, 10, 10, 10, 10, 10, 11, 12, 12, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 16, 16, 17, 18, 18, 18, 18, 18, 19, 20, 20, 21, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 23, 24, 24, 25, 26, 26, 26, 26
OFFSET
0,3
COMMENTS
a(n) + A081607(n) = n+1.
LINKS
MATHEMATICA
Accumulate[Table[If[DigitCount[n, 3, 0]==0, 1, 0], {n, 0, 80}]] (* Harvey P. Dale, Oct 21 2024 *)
PROG
(PARI) first(n)=my(s, t); vector(n, k, t=Set(digits(k, 3)); s+=!!t[1]) \\ Charles R Greathouse IV, Sep 02 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Mar 23 2003
STATUS
approved