OFFSET
0,4
COMMENTS
a(n) + A081608(n) = n+1.
LINKS
Robert Israel, Table of n, a(n) for n = 0..10000
MAPLE
f:= n -> `if`(has(convert(n, base, 3), 0), 1, 0):
ListTools:-PartialSums(map(f, [$0..100])); # Robert Israel, Mar 18 2018
MATHEMATICA
Accumulate[Boole[Table[DigitCount[n, 3, 0]>0, {n, 0, 80}]]] (* Harvey P. Dale, Jun 23 2017 *)
PROG
(PARI) first(n)=my(s, t); vector(n, k, t=Set(digits(k, 3)); s+=(t[1]==0)) \\ Charles R Greathouse IV, Sep 02 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Mar 23 2003
STATUS
approved