A287186 Positions of 1 in A287457; complement of A287519.

1, 9, 16, 23, 27, 35, 42, 46, 50, 57, 64, 68, 72, 79, 83, 91, 98, 105, 109, 117, 124, 128, 132, 139, 143, 151, 155, 163, 170, 174, 178, 185, 192, 196, 200, 207, 211, 219, 223, 231, 238, 242, 246, 253, 257, 265, 272, 279, 283, 291, 298, 302, 306, 313, 320

Offset: 1

Author

Clark Kimberling, Jun 18 2017

Keywords

• nonn
• easy

Comments

Conjecture: a(n)/n -> 5.90..., and if m denotes this number, then -1 < m - a(n)/n < 1 for n >= 3.

Links

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

Crossrefs

Cf. A287457, A287519.

Programs

Mathematica

s = {0, 0}; w[0] = StringJoin[Map[ToString, s]];
w[n_] := StringReplace[w[n - 1], {"00" -> "1000", "10" -> "000"}]
Table[w[n], {n, 0, 8}]
st = ToCharacterCode[w[23]] - 48   (* A287457 *)
Flatten[Position[st, 0]]  (* A287519 *)
Flatten[Position[st, 1]]  (* A287186 *)