# A257956 (b-file synthesized from sequence entry)
1 1
2 6
3 24
4 74
5 220
6 626
7 1754
8 4860
9 13390
10 36762
11 100728
12 275666
13 753898
14 2060924
15 5632550
16 15391650
17 42056008
18 114907626
19 313947186
20 857741852
21 2343430222