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A260401 Positions of 1 in the infinite palindromic word at A259599. 2
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)
OFFSET

1,2

COMMENTS

Complement of A260400, the positions of 0. See A260390 for a guide to related sequences.

LINKS

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

MATHEMATICA

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 *)

CROSSREFS

Cf. A260390, A260400, A259599.

Sequence in context: A112930 A224985 A282808 * A003159 A187691 A141259

Adjacent sequences:  A260398 A260399 A260400 * A260402 A260403 A260404

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Aug 13 2015

STATUS

approved

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Last modified February 18 00:28 EST 2020. Contains 332006 sequences. (Running on oeis4.)