# A187001 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 12
4 62
5 300
6 1635
7 9413
8 54505
9 321655
10 1938621
11 11834305
12 72975115
13 454385175
14 2852742151
15 18034439209
16 114709370133
17 733605250447
18 4714351916849
19 30426720332601
20 197141722168571
21 1281835943761551