# A331607 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 12
4 61
5 372
6 2639
7 21280
8 191833
9 1908688
10 20750331
11 244478784
12 3100597333
13 42088689216
14 608543191559
15 9332562964480
16 151252803045937
17 2582250195499264
18 46306562212010355
19 870011934425816064
20 17086276243125287917