# A309902 (b-file synthesized from sequence entry)
0 0
1 1
2 6
3 81
4 456
5 2956
6 6081
7 37331
8 349831
9 1521706
10 3474831
11 3474831
12 101131081
13 833552956
14 4495662331
15 16702693581
16 16702693581
17 169290584206
18 1695169490456
19 16953958552956
20 55100931209206
21 436570657771706
22 2343919290584206
23 9496476663631081