# A337456 (b-file synthesized from sequence entry)
1 1
2 6
3 30
4 126
5 534
6 2262
7 9534
8 40254
9 169302
10 702510
11 2929806
12 12222414
13 50908158
14 212134902
15 882794118
16 3654001326
17 15159263934
18 62906444238
19 260853828438
20 1081924309806
21 4484440327350