

A327221


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


3



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
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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 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



