# A218680 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 16
4 111
5 911
6 8622
7 91414
8 1067579
9 13564195
10 185687381
11 2718184470
12 42288343176
13 695667651368
14 12049465530936
15 218945489692574
16 4160440403683643
17 82448824370010887
18 1699889286488298603
19 36384381642357676480
20 806926050321577391347
21 18510872795071148287531