A286293 A compressed version of A286290.

1, 2, 4, 11, 17, 12, 14, 16, 29, 35, 24, 26, 28, 30, 32, 53, 59, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 98, 104, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 161, 167, 112, 114, 116, 118, 120, 122, 124, 126, 128, 130, 132, 134, 136

Offset

1,2

Links

Ray Chandler, Table of n, a(n) for n = 1..971

Example

Start with A064736, bisect to get A286290, take second difference, and we get:
1, 2, 7, 6, -5, 2, 2, 13, 6, -11, 2, 2, 2, 2, 21, 6, -19, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 36, 6, -34, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 57, 6, -55, 2, 2, ...
which appears to consist of runs of 2's separated by a triple of numbers.
Look at the runs in that sequence:
1, 1, 1, 1, 1, 2, 1, 1, 1, 4, 1, 1, 1, 11, 1, 1, 1, 17, 1, 1, 1, 12, 1, 1, 1, 14, 1, 1, 1, 16, 1, 1, 1, 29, 1, 1, 1, 35, 1, 1, 1, 24, 1, 1, 1, 26, 1, 1, ...
and take the 4i+2 subsequence, which gives the present sequence.

Crossrefs

Cf. A064736, A286290, A286291, A286292.

Sequence in context: A278595 A005822 A331653 * A167801 A216554 A018625

Adjacent sequences: A286290 A286291 A286292 * A286294 A286295 A286296

Keyword

nonn

Author

N. J. A. Sloane, May 23 2017

Status

approved