# A120972 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 21
4 217
5 2814
6 42510
7 718647
8 13270944
9 263532276
10 5567092665
11 124143735663
12 2905528740060
13 71058906460091
14 1809695198254281
15 47861102278428198
16 1311488806252697283
17 37164457324943708739