A287529 Positions of 0 in A287528.

1, 5, 9, 11, 13, 18, 21, 23, 25, 29, 31, 36, 37, 41, 45, 48, 50, 52, 57, 59, 61, 65, 67, 72, 73, 77, 81, 83, 85, 90, 91, 95, 99, 102, 104, 106, 109, 113, 117, 119, 121, 126, 129, 131, 133, 138, 140, 142, 146, 148, 153, 154, 158, 162, 165, 167, 169, 173, 175

Offset

1,2

Comments

a(n) - a(n-1) is in {1, 2, 3, 4, 5} for n >= 1; also, 3n - a(n) is in {0, 1, 2} for n >= 1. The first 20 numbers 3n - a(n) are 2, 1, 0, 1, 2, 0, 0, 1, 2, 1, 2, 0, 2, 1, 0, 0, 1, 2, 0, 1, with 0 in positions given by A189634, 1 in positions given by A189670, and 2 in positions given by A189670.

Links

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

Mathematica

s = Nest[Flatten[# /. {0->{0, 1, 2}, 1->{1, 0, 2}, 2->{2, 1, 0}}] &, {0}, 9]; (*A287528*)
Flatten[Position[s, 0]]; (*A287529*)
Flatten[Position[s, 1]]; (*A189670*)
Flatten[Position[s, 2]]; (*A189634*)

Crossrefs

Cf. A189670, A287528, A189634.

Sequence in context: A314585 A078621 A287521 * A179383 A076195 A191924

Adjacent sequences: A287526 A287527 A287528 * A287530 A287531 A287532

Keyword

nonn,easy

Author

Clark Kimberling, May 30 2017

Status

approved