# A120414 (b-file synthesized from sequence entry) 0 0 1 1 2 2 3 6 4 18 5 45 6 102 7 213 8 426 9 821 10 1538 11 2820 12 5075 13 8996 14 15743 15 27247 16 46709 17 79405 18 133996 19 224640 20 374400