A294449 a(n) = index where A088568 (or equally A294448) first reaches or exceeds n in magnitude.

1, 12, 93, 378, 471, 858, 1127, 1398, 1497, 1524, 1533, 20338, 20371, 21982, 22009, 25638, 25665, 25692, 27969, 39184, 39211, 42398, 43129, 43150, 48637, 48730, 48757, 49014, 49041, 49068, 49095, 49864, 50081, 50090, 50387, 50414, 50959, 51344, 52243, 52454

Offset

1,2

Comments

a(n) = smallest j such that |A088568(j)| >= n.

This is closely related to the function DELTA(n) studied by Brent (2016).

Links

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Richard P. Brent, Fast algorithms for the Kolakoski sequence, Slides from a talk, 2016.

Rémy Sigrist, C++ program

Prog

(C++) See Links section.

Crossrefs

Cf. A000002, A088568, A294448.

Cf. A022327, A025503.

Sequence in context: A044263 A044644 A173348 * A073913 A057410 A045894

Adjacent sequences: A294446 A294447 A294448 * A294450 A294451 A294452

Keyword

nonn

Author

N. J. A. Sloane, Nov 22 2017

Extensions

More terms from Rémy Sigrist, Dec 27 2022

Status

approved