# A214768 (b-file synthesized from sequence entry)
0 1
1 2
2 18
3 180
4 1734
5 18300
6 270420
7 5151720
8 96203910
9 1565102844
10 22108977596
11 287976684088
12 3835267955036
13 55283720348664
14 804522994149032
15 10849701753955856
16 150403977728200774
17 3086256025416536700
18 91156710989444409004
19 2687925748932854737432