# A146464 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 1
6 7
7 21
8 55
9 263
10 1645
11 13423
12 126629
13 1447199
14 21743065
15 415978809
16 9965909653
17 303132585251
18 11591760284391
19 555704916934105
20 33613901189599473
21 2574475177790739409