Correlation classes of pairs of different words.
0, 1, 0, 3, 6, 6, 0, 11, 20, 20, 20, 20, 0, 31, 54, 55, 55, 55, 55, 55, 0, 87, 141, 141, 141
1 seqfan posts
Wed Jan 14 23:42:22 CET 2009 [seqfan] Conjecture on required alphabet size to exhibit all correlation classes of pairs of words