# A000450 (b-file synthesized from sequence entry)
4 1
5 10
6 50
7 385
8 3130
9 28764
10 291900
11 3249210
12 39367395
13 515874470
14 7270929806
15 109691447395
16 1763782644020
17 30114243100760
18 544123405603800
19 10373304279494964
20 208092476689208805
21 4381794437494059810
22 96635643877147885450
23 2227562535558247510885