# A299754 (b-file synthesized from sequence entry)
1 1
2 3
3 10
4 25
5 126
6 127
7 1716
8 2241
9 18469
10 15231
11 352716
12 36973
13 5200300
14 1799995
15 30333601
16 24331777
17 1166803110
18 12247363
19 17672631900
20 723276561