OFFSET
1,2
LINKS
M. F. Hasler in reply to E. Angelini, The a(n)th digit of the sequence is visible in a(n), SeqFan list, Sep 27 2014
EXAMPLE
See the link.
a(10) cannot be 10 because in that case, the 11th digit would be "0" which does not occur in the number "11", so this number could appear nowhere else in the sequence.
PROG
(PARI) a(n, print_all=0, d=[], u=0, L)={for(n=1, n, for(k=1, 9e9, bittest(u, k)&&next;
for(j=1, #dk=digits(k), setsearch(Set(digits(#d+j)), dk[j])||next(2));
d=concat(d, digits(k)); u+=1<<L=k; print_all&&print1(k", "); break)); L} \\ M. F. Hasler, Sep 27 2014
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Eric Angelini and M. F. Hasler, Sep 27 2014
STATUS
approved