A327221 Positions of 1's in {A327219(k) : n > 0}.

3, 4, 7, 8, 11, 12, 15, 16, 17, 20, 21, 24, 25, 28, 29, 32, 33, 37, 38, 41, 42, 45, 46, 49, 50, 51, 54, 55, 58, 59, 62, 63, 66, 67, 71, 72, 75, 76, 79, 80, 83, 84, 87, 88, 92, 93, 96, 97, 100, 101, 104, 105, 106, 109, 110, 113, 114, 117, 118, 121, 122

Offset

1,1

Comments

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

Positive integers k such that A327219(k) = 1. - Jianing Song, Sep 30 2019

Links

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

Mathematica

r = (1+Sqrt[5])/2; z = 200;
t = Table[Floor[(2 n + 4) r] - Floor[(n*r + 4 r)] - Floor[n*r], {n, 1, z}]  (* {A327219(n) : n > 0} *)
Flatten[Position[t, 0]]  (* A327220 *)
Flatten[Position[t, 1]]  (* A327221 *)

Crossrefs

Cf. A327219, A327220 (complement).

Sequence in context: A288553 A295771 A285503 * A014601 A154708 A227148

Adjacent sequences: A327218 A327219 A327220 * A327222 A327223 A327224

Keyword

nonn,easy

Author

Clark Kimberling, Sep 02 2019

Extensions

Corrected by Jianing Song, Sep 30 2019

Status

approved