# A307733 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 14
4 54
5 220
6 934
7 4090
8 18344
9 83850
10 389214
11 1829736
12 8693962
13 41685714
14 201442188
15 980091814
16 4797070022
17 23603701828
18 116688837886
19 579312087802
20 2887020896016
21 14437318756818
22 72424982972862
23 364366674463824
24 1837954750285458