Number of sequences with terms 1, 2 or 3 summing to n with no three consecutive 1's.
1, 1, 2, 3, 6, 10, 17, 30, 52, 90, 156, 271, 470, 815, 1414, 2453, 4255, 7381, 12804
1 seqfan posts
Sat Oct 16 01:58:04 CEST 2010 [seqfan] Flipping 4 Penney's game sequences