# A129017 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 2 4 4 5 4 6 12 7 19 8 19 9 46 10 70 11 70 12 162 13 239 14 239 15 504 16 726 17 726 18 1471 19 2062 20 2062