# A096979 (b-file synthesized from sequence entry)
0 0
1 1
2 6
3 36
4 210
5 1225
6 7140
7 41616
8 242556
9 1413721
10 8239770
11 48024900
12 279909630
13 1631432881
14 9508687656
15 55420693056
16 323015470680
17 1882672131025
18 10973017315470
19 63955431761796
20 372759573255306
21 2172602007770041