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A043884 Numbers n such that 1 and 3 occur juxtaposed in the base 4 representation of n but not of n+1. 0
7, 13, 23, 31, 39, 45, 55, 61, 71, 77, 87, 95, 103, 109, 127, 135, 141, 151, 159, 167, 173, 183, 189, 199, 205, 223, 231, 237, 247, 253, 263, 269, 279, 287, 295, 301, 311, 317, 327, 333, 343, 351, 359, 365, 383, 391, 397, 407, 415 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..49.

CROSSREFS

Sequence in context: A293657 A048449 A147812 * A129727 A275897 A227786

Adjacent sequences:  A043881 A043882 A043883 * A043885 A043886 A043887

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified May 19 12:59 EDT 2019. Contains 323393 sequences. (Running on oeis4.)