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%I
%S 1,2,4,6,9,14,22,33,49,74,112,169,254,381,573,862,1292,1936,2902,4352,
%T 6525,9788,14687,22028,33050,49576,74378,111579,167387,251089,376630,
%U 564931,847375,1271058,1906627,2859983,4289952,6434942,9652396
%N From substitutional generation of Kolakoski sequence (A000002).
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/KolakoskiSequence.html">Kolakoski sequence.</a>
%F Generate A000002 via 2 -> 22 -> 2211 -> 221121 -> 221121221 -> ...; sequence gives lengths of successive strings.
%F a(n) appears to be asymptotic to c*(3/2)^n where c=1.3094.. - _Benoit Cloitre_, Dec 18 2002
%K nonn,nice,easy
%O 1,2
%A _David W. Wilson_
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