# A054149 (b-file synthesized from sequence entry)
1 1
2 14
3 84
4 410
5 1820
6 7648
7 31008
8 122584
9 475600
10 1818656
11 6874560
12 25742624
13 95645888
14 353032960
15 1295729664
16 4732541824
17 17211685120
18 62362187264
19 225201546240
20 810825419264
21 2911520685056
22 10429433085952