# A307680 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 17
4 131
5 1239
6 14029
7 187627
8 2906553
9 50982929
10 993806531
11 21270277401
12 496425262123
13 12577053063847
14 344382608381421
15 10139294386051139
16 319175215666010609
17 10684742192933940897
18 378662321114852778883
19 14158327369578651838369
20 557151639159864934384851