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 A327181 Positions of 0's in {A327180(n) : n > 0}. 3

%I

%S 2,6,7,9,10,11,13,17,21,22,24,25,26,28,32,35,36,37,39,40,41,43,47,50,

%T 51,52,54,58,62,63,65,66,67,69,73,77,78,80,81,82,84,88,91,92,93,95,96,

%U 97,99,103,104,106,107,108,110,114,118,119,121,122,123,125

%N Positions of 0's in {A327180(n) : n > 0}.

%C Although a(n)/n->2, the sequence 2*n-a(n) appears to be unbounded below and above.

%C Positive integers k such that A327180(k) = 0. - _Jianing Song_, Sep 30 2019

%H Clark Kimberling and Jianing Song, <a href="/A327181/b327181.txt">Table of n, a(n) for n = 1..10000</a>

%t r = Sqrt[3]; z = 200;

%t t = Table[Floor[(2 n + 1)*r] - Floor[n*r + r] - Floor[n*r], {n, 1, z}] (* {A327180(n) : n > 0} *)

%t Flatten[Position[t, 0]] (* A327181 *)

%t Flatten[Position[t, 1]] (* A327182 *)

%Y Cf. A327180, A327182 (complement).

%K nonn,easy

%O 1,1

%A _Clark Kimberling_, Aug 25 2019

%E Corrected by _Jianing Song_, Sep 30 2019

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Last modified September 21 09:52 EDT 2021. Contains 347597 sequences. (Running on oeis4.)