A020904 Positions of 2 in A020903; complement of A191777.

2, 4, 7, 9, 11, 13, 16, 18, 22, 24, 27, 29, 31, 34, 37, 39, 42, 44, 46, 48, 51, 53, 56, 58, 61, 63, 65, 67, 69, 72, 74, 76, 79, 81, 84, 86, 88, 90, 92, 94, 97, 99, 101, 103, 106, 108, 111, 113, 115, 117, 121, 123, 126, 128, 130, 132, 135, 137, 139, 142

Offset

1,1

Links

Table of n, a(n) for n=1..60.

C. Kimberling, Fractal sequences

C. Kimberling, Numeration systems and fractal sequences, Acta Arithmetica 73 (1995) 103-117.

Example

A020903 starts 1,2,1,2,1,1,2,1,2,... in which 2 occupies positions 2, 4, 7, 9, 11,... (Positions refer to offset 1 in A020903).

Mathematica

(See A020903.)

Crossrefs

Cf. A020903, A191777.

Sequence in context: A022848 A287723 A284589 * A043000 A160822 A111495

Adjacent sequences: A020901 A020902 A020903 * A020905 A020906 A020907

Keyword

nonn

Author

Clark Kimberling

Status

approved