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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, 49999999999090850760 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS 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. Int. Seq. 15 (2012) #12.6.7 J. Nilsson, Letter Frequencies in the Kolakoski Sequence, Acta Physica Polonica A, 126 (2014), 549-552. Michael Rao, Trucs et bidules sur la sÃ©quence de Kolakoski, 2012, in French. 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 a(20) from Richard P. Brent, Mar 01 2018 STATUS approved

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Last modified October 15 05:56 EDT 2018. Contains 316202 sequences. (Running on oeis4.)