A287266 Positions of 2 in A287263.

2, 4, 8, 10, 20, 22, 26, 28, 44, 46, 54, 56, 58, 60, 64, 66, 76, 78, 82, 84, 100, 102, 110, 112, 120, 122, 130, 132, 134, 136, 140, 142, 152, 154, 162, 164, 166, 168, 172, 174, 178, 180, 184, 186, 196, 198, 202, 204, 220, 222, 230, 232, 234, 236, 240, 242

Offset

1,1

Links

Clark Kimberling, Table of n, a(n) for n = 1..7807

Mathematica

s = Nest[Flatten[# /. {0 -> {1, 1}, 1 -> {0, 2}, 2 -> 0}] &, {0}, 10] (* A287263 *)
Flatten[Position[s, 0]] (* A287264 *)
Flatten[Position[s, 1]] (* A287265 *)
Flatten[Position[s, 2]] (* A287266 *)

Crossrefs

Cf. A287263, A287264, A287265.

Sequence in context: A322375 A261931 A173816 * A306719 A185400 A099942

Adjacent sequences: A287263 A287264 A287265 * A287267 A287268 A287269

Keyword

nonn,easy

Author

Clark Kimberling, May 24 2017

Status

approved