|
|
|
|
2, 3, 5, 8, 9, 12, 14, 17, 20, 21, 23, 26, 27, 30, 33, 34, 36, 39, 41, 44, 45, 48, 50, 53, 56, 57, 59, 62, 64, 67, 68, 71, 74, 75, 77, 80, 81, 84, 86, 89, 92, 93, 95, 98, 99, 102, 105, 106, 108, 111, 113, 116, 117, 120, 123, 124, 126, 129, 130, 133, 135, 138
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
a(n) - a(n-1) is in {1,2,3} for n>=2. Conjecture: a(n)/n -> 9/4.
|
|
LINKS
|
|
|
EXAMPLE
|
As a word, A286490 = 011010011001010010011..., in which 1 is in positions 2,3,5,8,9,12,...
|
|
MATHEMATICA
|
s = Nest[Flatten[# /. {0 -> {0, 1}, 1 -> {1, 0}}] &, {0}, 9] (* A010060 *)
w = StringJoin[Map[ToString, s]]
w1 = StringReplace[w, {"0101" -> "0"}]
st = ToCharacterCode[w1] - 48 (* A286490 *)
Flatten[Position[st, 0]] (* A286491 *)
Flatten[Position[st, 1]] (* A286492 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|