# A000440 (b-file synthesized from sequence entry)
4 9
5 30
6 180
7 980
8 8326
9 70272
10 695690
11 7518720
12 89193276
13 1148241458
14 15947668065
15 237613988040
16 3780133322620
17 63945806121448
18 1146081593303784
19 21693271558730304
20 432411684714253605
21 9053476937543082240
22 198641103956454088919