OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Range[200], Intersection[IntegerDigits[#, 2], IntegerDigits[#, 7]]=={}&] (* Vincenzo Librandi, Jun 07 2012 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved