# A181998 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 18
4 124
5 935
6 7443
7 61510
8 522467
9 4532452
10 39985628
11 357641094
12 3235846003
13 29565353095
14 272429349163
15 2528938553028
16 23629834081955
17 222080711420655
18 2098112946860819
19 19915641133236764
20 189853287434733709
21 1816924035668823659
22 17450483777418686431