OFFSET
0,4
COMMENTS
a(n) + A061392(n) = n+1.
PROG
(PARI) has(n)=!!setsearch(Set(digits(n, 3)), 1)
first(n)=my(s); vector(n, k, s+=has(k)) \\ Charles R Greathouse IV, Sep 02 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Mar 23 2003
STATUS
approved