# A307006 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 20
4 130
5 1052
6 10214
7 115684
8 1497458
9 21806372
10 352834942
11 6279885284
12 121932835754
13 2564788969108
14 58098821674742
15 1410088008633812
16 36505125340079074
17 1004131069129741124
18 29244927598399536878
19 899066450011962665092
20 29094401487631077315482
21 988590340245276942963764