# A340921 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 8 4 16 5 36 6 80 7 194 8 506 9 1400 10 4024 11 11870 12 35200 13 104836 14 311686 15 929088 16 2776618 17 8321128 18 24967712 19 74985708