A287203 Positions of 2 in A287200.

1, 2, 5, 6, 15, 16, 19, 20, 23, 24, 33, 34, 43, 44, 53, 54, 59, 60, 65, 66, 69, 70, 73, 74, 83, 84, 87, 88, 91, 92, 101, 102, 105, 106, 109, 110, 119, 120, 129, 130, 139, 140, 145, 146, 151, 152, 155, 156, 159, 160, 169, 170, 179, 180, 189, 190, 195, 196

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. A287200, A287201, A287202.

Programs

Mathematica

s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {2, 2}, 2 -> 0}] &, {0}, 11] (* A287200 *)
Flatten[Position[s, 0]] (* A287201 *)
Flatten[Position[s, 1]] (* A287202 *)
Flatten[Position[s, 2]] (* A287203 *)