login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A195206 Number of 1s in the first 10^n entries of the Kolakoski sequence, A000002. 2
1, 5, 49, 502, 4996, 49972, 499986, 5000046, 50000675, 500001223, 4999997671, 50000001587, 500000050701, 5000000008159, 50000000316237 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..14.

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

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: A146311 A001079 A212818 * A081474 A112241 A216483

Adjacent sequences:  A195203 A195204 A195205 * A195207 A195208 A195209

KEYWORD

nonn,more,changed

AUTHOR

Johan Nilsson, Sep 13 2011

EXTENSIONS

a(14) from Ed Wynn, Jun 24 2014

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified October 21 23:13 EDT 2014. Contains 248381 sequences.