# A331726 (b-file synthesized from sequence entry)
0 0
1 1
2 6
3 45
4 448
5 5825
6 95796
7 1926043
8 45944256
9 1269187137
10 39840825700
11 1400286658331
12 54462564354672
13 2321934762267601
14 107664031299459012
15 5393893268767761675
16 290341440380472614656
17 16710435419661861992705
18 1024009456958258244673860