A037354 Numbers whose base-4 and base-7 expansions have no digits in common.

4, 5, 6, 8, 10, 11, 12, 15, 16, 17, 19, 20, 21, 24, 25, 26, 32, 33, 34, 38, 39, 40, 41, 42, 43, 46, 47, 48, 60, 62, 63, 116, 117, 150, 153, 160, 204, 207, 212, 215, 228, 229, 230, 231, 232, 235, 236, 237, 238, 239, 240, 242, 243, 244, 245

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Mathematica

Select[Range[500], Intersection[IntegerDigits[#, 4], IntegerDigits[#, 7]]=={}&] (* Vincenzo Librandi, Jun 07 2012 *)

Crossrefs

Sequence in context: A087947 A053427 A272054 * A328983 A223133 A295485

Adjacent sequences: A037351 A037352 A037353 * A037355 A037356 A037357

Keyword

nonn,base

Author

Clark Kimberling

Status

approved