

A327181


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


3



2, 6, 7, 9, 10, 11, 13, 17, 21, 22, 24, 25, 26, 28, 32, 35, 36, 37, 39, 40, 41, 43, 47, 50, 51, 52, 54, 58, 62, 63, 65, 66, 67, 69, 73, 77, 78, 80, 81, 82, 84, 88, 91, 92, 93, 95, 96, 97, 99, 103, 104, 106, 107, 108, 110, 114, 118, 119, 121, 122, 123, 125
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OFFSET

1,1


COMMENTS

Although a(n)/n>2, the sequence 2*na(n) appears to be unbounded below and above.
Positive integers k such that A327180(k) = 0.  Jianing Song, Sep 30 2019


LINKS

Clark Kimberling and Jianing Song, Table of n, a(n) for n = 1..10000


MATHEMATICA

r = Sqrt[3]; z = 200;
t = Table[Floor[(2 n + 1)*r]  Floor[n*r + r]  Floor[n*r], {n, 1, z}] (* {A327180(n) : n > 0} *)
Flatten[Position[t, 0]] (* A327181 *)
Flatten[Position[t, 1]] (* A327182 *)


CROSSREFS

Cf. A327180, A327182 (complement).
Sequence in context: A102046 A019913 A299421 * A047554 A206446 A079335
Adjacent sequences: A327178 A327179 A327180 * A327182 A327183 A327184


KEYWORD

nonn,easy


AUTHOR

Clark Kimberling, Aug 25 2019


EXTENSIONS

Corrected by Jianing Song, Sep 30 2019


STATUS

approved



