A043047 a(n) = (s(n)+3)/4, where s(n) is the n-th base-4 palindrome that starts with 1 (A043003).

1, 2, 5, 6, 7, 8, 17, 22, 27, 32, 65, 69, 73, 77, 82, 86, 90, 94, 99, 103, 107, 111, 116, 120, 124, 128, 257, 277, 297, 317, 322, 342, 362, 382, 387, 407, 427, 447, 452, 472, 492, 512, 1025, 1041, 1057, 1073, 1093, 1109, 1125, 1141

Offset

1,2

Links

Table of n, a(n) for n=1..50.

Crossrefs

Cf. A007090, A043003.

Sequence in context: A220655 A246263 A191205 * A327016 A271107 A014355

Adjacent sequences: A043044 A043045 A043046 * A043048 A043049 A043050

Keyword

nonn,base

Author

Clark Kimberling

Status

approved