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A043638 Numbers n such that base 10 representation has exactly 2 runs. 2
10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 100, 110, 112, 113, 114, 115, 116, 117, 118, 119, 122, 133, 144, 155, 166, 177, 188, 199, 200 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Coincides with sequence "Number of runs in the base 10 representation of n is even" until reaching 1234.

CROSSREFS

Cf. A023752.

Sequence in context: A139819 A031955 A029742 * A102357 A102850 A043493

Adjacent sequences:  A043635 A043636 A043637 * A043639 A043640 A043641

KEYWORD

nonn,base,easy

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified February 14 20:38 EST 2012. Contains 205663 sequences.