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A081606 Numbers having at least one 1 in their ternary representation. 6

%I

%S 1,3,4,5,7,9,10,11,12,13,14,15,16,17,19,21,22,23,25,27,28,29,30,31,32,

%T 33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,55,57,

%U 58,59,61,63,64,65,66,67,68,69,70,71,73,75,76,77,79,81,82,83,84,85,86

%N Numbers having at least one 1 in their ternary representation.

%C Complement of A005823.

%C n such that central Delannoy number A001850(n) == 0 (mod 3). - _Emeric Deutsch_ and _Bruce E. Sagan_, Dec 04 2003

%H Johann Cigler, <a href="https://arxiv.org/abs/1611.05252">Some elementary observations on Narayana polynomials and related topics</a>, arXiv:1611.05252 [math.CO], 2016. See p.25.

%Y Cf. A007089, A062756, A081609, A081605, A074940.

%K nonn,base

%O 1,2

%A _Reinhard Zumkeller_, Mar 23 2003

%E More terms from _Emeric Deutsch_ and _Bruce E. Sagan_, Dec 04 2003

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Last modified April 15 04:04 EDT 2021. Contains 342974 sequences. (Running on oeis4.)