# A163632 (b-file synthesized from sequence entry)
0 1
1 3
2 9
3 72
4 612
5 6381
6 34191
7 375201
8 3065211
9 3365919
10 75779001
11 300733722
12 661102209
13 7266033891
14 37610189712
15 631965038211
16 3364115985981
17 34975974329001
18 300789229729401
19 302881986763209
20 726982069546809