# A052183 (b-file synthesized from sequence entry)
0 2
1 3
2 12
3 60
4 330
5 1911
6 11424
7 69768
8 432630
9 2713425
10 17168580
11 109390320
12 700939512
13 4512458580
14 29164264320
15 189120846288
16 1229917589262
17 8018580361365
18 52392620853300
19 342991368096300
20 2249282417749290