A287182 Positions of 2 in A287179.

7, 17, 21, 23, 30, 40, 50, 54, 56, 63, 67, 69, 73, 75, 82, 92, 96, 98, 105, 115, 125, 129, 131, 138, 148, 158, 162, 164, 171, 175, 177, 181, 183, 190, 200, 204, 206, 213, 217, 219, 223, 225, 232, 236, 238, 242, 244, 251, 261, 265, 267, 274, 284, 294, 298

Offset: 1

Author

Clark Kimberling, May 23 2017

Keywords

• nonn
• easy

Links

• Clark Kimberling, Table of n, a(n) for n = 1..10000 (terms 7754 ff. corrected by _Georg Fischer_, Jun 04 2020)

Crossrefs

Cf. A287179, A287180, A287181.

Programs

Mathematica

s = Nest[Flatten[# /. {0 -> {1, 0}, 1 -> {2, 0}, 2 -> 1}] &, {0}, 9] (* A287179 *)
Flatten[Position[s, 0]] (* A287180 *)
Flatten[Position[s, 1]] (* A287181 *)
Flatten[Position[s, 2]] (* A287182 *)