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A195206 Number of 1s in the first 10^n entries of the Kolakoski sequence, A000002. 4
1, 5, 49, 502, 4996, 49972, 499986, 5000046, 50000675, 500001223, 4999997671, 50000001587, 500000050701, 5000000008159, 50000000316237, 500000000977421, 4999999994637728, 49999999977479348, 499999999944465105, 4999999999725703450 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..19.

J. Nilsson, A Space Efficient Algorithm for the Calculation of the Digit Distribution in the Kolakoski Sequence, arXiv preprint arXiv:1110.4228 [math.CO], 2011.

J. Nilsson, Letter Frequencies in the Kolakoski Sequence, Acta Physica Polonica A, 126 (2014), 549-552.

Ed Wynn, C program to calculate A195206 (and A195211 etc)

EXAMPLE

The first entries of the Kolakoski sequence, A000002, are 1221121221... From this we see that a(0)=1, since the first letter is 1, and a(1)=5 since among the first 10 letters 5 of them are 1s.

CROSSREFS

Cf. A000002.

Sequence in context: A001079 A146311 A212818 * A081474 A274671 A112241

Adjacent sequences:  A195203 A195204 A195205 * A195207 A195208 A195209

KEYWORD

nonn

AUTHOR

Johan Nilsson, Sep 13 2011

EXTENSIONS

a(14) from Ed Wynn, Jun 24 2014

a(15)-a(19) from Richard P. Brent, Jul 02 2017

STATUS

approved

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Last modified August 21 16:00 EDT 2017. Contains 290890 sequences.