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A195206
Number of 1s in the first 10^n entries of the Kolakoski sequence, A000002.
5
1, 5, 49, 502, 4996, 49972, 499986, 5000046, 50000675, 500001223, 4999997671, 50000001587, 500000050701, 5000000008159, 50000000316237, 500000000977421, 4999999994637728, 49999999977479348, 499999999944465105, 4999999999725703450, 49999999999090850760
OFFSET
0,2
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 A370097 A274671
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