# A052896 (b-file synthesized from sequence entry)
0 0
1 0
2 2
3 12
4 64
5 350
6 2024
7 12460
8 81638
9 567888
10 4180848
11 32470834
12 265219332
13 2271692124
14 20350705418
15 190216812260
16 1850993707960
17 18714559108142
18 196237054861920
19 2130518566431620
20 23912733627261670
21 277078872201375976
22 3310142647325149512