# A168595 (b-file synthesized from sequence entry)
0 1
1 4
2 36
3 358
4 3748
5 40404
6 443886
7 4941654
8 55555236
9 629285416
10 7170731236
11 82108083204
12 943960439086
13 10889085499348
14 125974782200478
15 1461030555025458
16 16981658850393252
17 197757344280343968