# A145620 (b-file synthesized from sequence entry)
1 1
2 2
3 5
4 140
5 35
6 770
7 5005
8 40040
9 510510
10 646646
11 323323
12 29745716
13 14300825
14 12257850
15 59246275
16 29386152400
17 7346538100
18 77138650050
19 475688341975
20 24735793782700
21 253541886272675
22 21804602219450050
23 10902301109725025