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%I #5 Mar 31 2012 13:22:26
%S 4,7,13,16,20,23,28,31,34,40,43,48,51,55,59,64,68,71,76,79,85,88,94,
%T 97,101,104,109,113,116,121,124,128,131,134,140,143,148,152,157,160,
%U 164,168,173,176,179,184,187,191,194,199,202,208,211,217,220,223,227
%N Positions in the Kolakoski sequence (A000002) where there are an even number of 1's and the current term is 1.
%C n such that A000002(n) = 1 and A000002(m) = 1 for an even number of indices m <= n.
%H Nathaniel Johnston, <a href="/A074273/b074273.txt">Table of n, a(n) for n = 1..10000</a>
%e The Kolakoski sequence begins 1,2,2,1,1,2,1,2,2,1,2,2,1,1,... Therefore at positions 4, 7 and 13 we have 2,4 and 6 1's in the sequence.
%Y Cf. A074274, A074278.
%K nonn,easy
%O 1,1
%A _Jon Perry_, Sep 21 2002
%E Edited and extended by _Nathaniel Johnston_, May 02 2011
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