A032928 Numbers whose set of base-7 digits is {1,2}.

1, 2, 8, 9, 15, 16, 57, 58, 64, 65, 106, 107, 113, 114, 400, 401, 407, 408, 449, 450, 456, 457, 743, 744, 750, 751, 792, 793, 799, 800, 2801, 2802, 2808, 2809, 2850, 2851, 2857, 2858, 3144, 3145, 3151, 3152, 3193, 3194, 3200, 3201

Offset

1,2

Links

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

Mathematica

Flatten[Table[FromDigits[#, 7]&/@Tuples[{1, 2}, n], {n, 5}]] (* Vincenzo Librandi, Jun 03 2012 *)

Prog

(Magma) [n: n in [1..3500] | Set(IntegerToSequence(n, 7)) subset {1, 2}]; // Vincenzo Librandi, Jun 03 2012

Crossrefs

Sequence in context: A305177 A327299 A047353 * A287564 A158458 A056805

Adjacent sequences: A032925 A032926 A032927 * A032929 A032930 A032931

Keyword

nonn,base

Author

Clark Kimberling

Status

approved