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A270887 Numbers written in binary balanced system (A270885) that have exactly two zeros. 3
4, 6, 7, 17, 18, 19, 20, 22, 23, 25, 26, 27, 29, 69, 73, 74, 75, 77, 81, 82, 83, 84, 86, 87, 89, 90, 91, 93, 101, 105, 106, 107, 109, 117, 277, 293, 297, 298, 299, 301, 309, 325, 329, 330, 331, 333, 337, 338, 339, 340, 342, 343, 345, 346, 347, 349, 357, 361 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..58.

Vladimir Shevelev, Two analogs of Thue-Morse sequence, arXiv:1603.04434 [math.NT], 2016.

EXAMPLE

19 = 2^4+2+1 = 2^5-2^4+2^2-2+2-1 = 1-1010-1_b. So 19 is a member.

MATHEMATICA

Select[Range@ 361, Count[Plus @@ {PadRight[#, Length@ # + 1], -PadLeft[#, Length@ # + 1]} &@ IntegerDigits[#, 2], 0] == 2 &] (* Michael De Vlieger, Mar 25 2016 *)

CROSSREFS

Cf. A270885, A270886.

Sequence in context: A102141 A107919 A165404 * A213034 A102131 A102137

Adjacent sequences:  A270884 A270885 A270886 * A270888 A270889 A270890

KEYWORD

nonn,base

AUTHOR

Vladimir Shevelev, Mar 25 2016

EXTENSIONS

More terms from Peter J. C. Moses, Mar 25 2016

STATUS

approved

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Last modified January 19 15:37 EST 2020. Contains 331049 sequences. (Running on oeis4.)