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%I #9 Nov 22 2017 21:01:22
%S 2,4,6,18,54
%N Lengths of square subwords (WW) of Kolakoski sequence A000002.
%C Carpi also shows that the Kolakoski sequence contains no cubes.
%H Arturo Carpi, <a href="https://doi.org/10.1016/0020-0190(94)00162-6">On repeated factors in C∞-words</a>, Information Processing Letters 52 (1994), 289-294.
%Y Cf. A000002.
%K nonn,fini,full
%O 1,1
%A _N. J. A. Sloane_, Nov 21 2017
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