A031952 Numbers with exactly two distinct base-7 digits.

7, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29, 30, 31, 33, 34, 35, 36, 37, 38, 39, 41, 42, 43, 44, 45, 46, 47, 49, 50, 56, 58, 59, 60, 61, 62, 64, 65, 71, 73, 78, 81, 85, 89, 92, 97, 98, 100, 106, 107, 112, 113

Offset

1,1

Links

Table of n, a(n) for n=1..60.

Crossrefs

Cf. A007093.

Sequence in context: A262310 A167628 A112954 * A043617 A043696 A043397

Adjacent sequences: A031949 A031950 A031951 * A031953 A031954 A031955

Keyword

nonn,base

Author

Clark Kimberling

Status

approved