A287323 Positions of 2 in A287320.

3, 4, 9, 10, 13, 14, 17, 18, 27, 28, 33, 34, 39, 40, 43, 44, 47, 48, 57, 58, 61, 62, 65, 66, 75, 76, 79, 80, 83, 84, 93, 94, 103, 104, 113, 114, 119, 120, 125, 126, 129, 130, 133, 134, 143, 144, 149, 150, 155, 156, 159, 160, 163, 164, 173, 174, 179, 180, 185

Offset: 1

Author

Clark Kimberling, May 23 2017

Keywords

• nonn
• easy

Links

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

Crossrefs

Cf. A287320, A287321, A287322.

Programs

Mathematica

s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {2, 2}, 2 -> 0}] &, {0}, 9] (* A287175 *)
Flatten[Position[s, 0]] (* A287321 *)
Flatten[Position[s, 1]] (* A287322 *)
Flatten[Position[s, 2]] (* A287323 *)