# A188168 (b-file synthesized from sequence entry)
0 1
1 1
2 10
3 55
4 325
5 1900
6 11125
7 65125
8 381250
9 2231875
10 13065625
11 76487500
12 447765625
13 2621265625
14 15345156250
15 89832109375
16 525886328125
17 3078592187500
18 18022392578125
19 105504923828125
20 617636582031250
21 3615707529296875
22 21166720556640625