# A143523 (b-file synthesized from sequence entry)
0 1
1 3
2 10
3 42
4 248
5 1992
6 19600
7 222288
8 2851712
9 41075328
10 658359040
11 11621260032
12 223832419328
13 4669549335552
14 104894256056320
15 2524539033397248
16 64811332658757632
17 1767891945806266368
18 51060500413513400320