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A260401
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Positions of 1 in the infinite palindromic word at A259599.
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2
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1, 3, 4, 5, 7, 9, 11, 12, 13, 15, 16, 17, 19, 20, 21, 23, 25, 27, 28, 29, 31, 32, 33, 35, 36, 37, 39, 41, 43, 44, 45, 47, 48, 49, 51, 52, 53, 55, 57, 59, 60, 61, 63, 64, 65, 67, 68, 69, 71, 73, 75, 76, 77, 79, 80, 81, 83, 84, 85, 87, 89, 91, 92, 93, 95, 96
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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Complement of A260400, the positions of 0. See A260390 for a guide to related sequences.
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LINKS
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MATHEMATICA
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u[1] = {1, 0, 1}; m[1] = {u[1][[1]]};
u[n_] := u[n] = Join[u[n - 1], m[n - 1], Reverse[u[n - 1]]];
m[k_] := {u[k][[k]]}; v = u[6] (* A259599 *)
Table[Length[u[n]], {n, 1, 20}] (* A000225 *)
Flatten[Position[u[8], 0]] (* A260400 *)
Flatten[Position[u[8], 1]] (* A260401 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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