A327257 Positions of 0's in {A327256(n) : n > 0}.

3, 4, 5, 9, 10, 11, 15, 16, 17, 21, 22, 23, 27, 28, 29, 33, 34, 38, 39, 40, 44, 45, 46, 50, 51, 52, 56, 57, 58, 62, 63, 64, 68, 69, 73, 74, 75, 79, 80, 81, 85, 86, 87, 91, 92, 93, 97, 98, 99, 102, 103, 104, 108, 109, 110, 114, 115, 116, 120, 121, 122

Offset: 1

Author

Clark Kimberling, Sep 03 2019

Keywords

• nonn
• easy

Comments

Although a(n)/n->2, the sequence a(n)-2n appears to be unbounded.

Positive integers k such that A327256(k) = 0. - Jianing Song, Sep 30 2019

Links

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

Crossrefs

Cf. A327256, A327258 (complement).

Programs

Mathematica

r = Sqrt[8]; z = 300;
t = Table[Floor[2 n r] - 2 Floor[n*r], {n, 1, z}]  (* {A327256(n) : n > 0} *)
Flatten[Position[t, 0]]  (* A327257 *)
Flatten[Position[t, 1]]  (* A327258 *)

Extensions

Corrected by Jianing Song, Sep 29 2019