%I #5 Mar 30 2012 18:35:25
%S 2,5,4,3,2,10,9,23,22,21,20,112,111,110,109,108,107,106,673,672,671,
%T 670,669,668,667,666,665,664,663,662,661,660,659,658,657,656,655,654,
%U 653,652,651,650,649,10305,10304,10303,10302,10301,10300,10299,10298,10297,10296
%N Least k>1 such that reverse complement of first n terms of Kolakoski sequence (A000002) repeats beginning at k-th term.
%K nonn
%O 1,1
%A _David W. Wilson_