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A031949 Numbers in which the number of distinct base 4 digits is 2. 0
4, 6, 7, 8, 9, 11, 12, 13, 14, 16, 17, 20, 22, 23, 25, 26, 29, 31, 32, 34, 37, 38, 40, 41, 43, 46, 47, 48, 51, 53, 55, 58, 59, 60, 61, 62, 64, 65, 68, 69, 80, 81, 84, 86, 87, 89, 90, 93, 95, 101, 102, 105, 106, 117, 119, 125, 127, 128, 130 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

CROSSREFS

Sequence in context: A074764 A101087 A138887 * A043693 A043593 A043827

Adjacent sequences:  A031946 A031947 A031948 * A031950 A031951 A031952

KEYWORD

nonn,base

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified February 15 21:07 EST 2012. Contains 205856 sequences.