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A286293 A compressed version of A286290. 5
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified April 3 22:48 EDT 2020. Contains 333207 sequences. (Running on oeis4.)