# A116428 (b-file synthesized from sequence entry)
0 1
1 4
2 22
3 125
4 669
5 3410
6 16677
7 78369
8 359110
9 1612613
10 7133274
11 31185350
12 135062165
13 580556958
14 2480278767
15 10542976739
16 44626102826
17 188215850830
18 791374442571
19 3318478309647
20 13882441625034
21 57952990683107