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A288222
Positions of 1 in A288220; complement of A288221.
3
1, 6, 10, 13, 15, 20, 22, 28, 32, 35, 37, 41, 46, 49, 51, 57, 59, 64, 68, 71, 73, 78, 80, 86, 88, 93, 97, 100, 102, 108, 111, 113, 117, 122, 126, 129, 131, 135, 140, 143, 145, 151, 153, 158, 162, 165, 167, 171, 176, 180, 183, 185, 190, 192, 198, 201, 203
OFFSET
1,2
COMMENTS
Conjecture: a(n)/n -> 3.61..., and if m denotes this number, then 0 < m - a(n)/n < 0 for n >= 1.
LINKS
MATHEMATICA
s = {0, 0}; w[0] = StringJoin[Map[ToString, s]];
w[n_] := StringReplace[w[n - 1], {"00" -> "1000", "10" -> "010"}]
Table[w[n], {n, 0, 8}]
st = ToCharacterCode[w[22]] - 48 (* A288220 *)
Flatten[Position[st, 0]] (* A288221 *)
Flatten[Position[st, 1]] (* A288222 *)
CROSSREFS
Sequence in context: A213428 A006187 A346958 * A004234 A121149 A315140
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Jun 19 2017
STATUS
approved