# A006632 (b-file synthesized from sequence entry)
1 1
2 3
3 15
4 91
5 612
6 4389
7 32890
8 254475
9 2017356
10 16301164
11 133767543
12 1111731933
13 9338434700
14 79155435870
15 676196049060
16 5815796869995
17 50318860986108
18 437662920058980
19 3824609516638444
20 33563127932394060
21 295655735395397520
22 2613391671568320765