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 A044859 Positive integers having the same number of base-3 runs of odd length as even. 1
 9, 12, 14, 17, 18, 22, 24, 25, 81, 108, 117, 120, 122, 125, 134, 161, 162, 202, 216, 229, 234, 238, 240, 241, 252, 255, 257, 260, 261, 265, 267, 268, 279, 287, 315, 319, 327, 329, 330, 331, 333, 336, 338, 341, 342, 346, 348, 349 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Robert Israel, Table of n, a(n) for n = 1..10000 MAPLE f:= proc(n) local L; L:= [-1, op(convert(n, base, 3)), -1]; L:= L[1..-2]-L[2..-1]; L:= select(t -> L[t]<>0, [\$1..nops(L)]); L:= L[2..-1]-L[1..-2]; convert(L mod 2, `+`)*2 = nops(L) end proc: select(f, [\$1..1000]); # Robert Israel, Jun 11 2019 CROSSREFS Sequence in context: A351042 A259313 A170951 * A336754 A336756 A114306 Adjacent sequences: A044856 A044857 A044858 * A044860 A044861 A044862 KEYWORD nonn,base AUTHOR Clark Kimberling STATUS approved

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Last modified May 24 03:55 EDT 2024. Contains 372771 sequences. (Running on oeis4.)