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A031952 Numbers in which the number of distinct base 7 digits is 2. 2
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

CROSSREFS

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

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Last modified August 25 03:55 EDT 2019. Contains 326318 sequences. (Running on oeis4.)