# A137745 (b-file synthesized from sequence entry)
0 0
1 0
2 0
3 0
4 0
5 1
6 5
7 19
8 66
9 218
10 700
11 2218
12 6997
13 22064
14 69662
15 220395
16 699090
17 2224114
18 7098773
19 22733498
20 73048903
21 235504760