# A325995 (b-file synthesized from sequence entry)
0 1
1 2
2 10
3 66
4 920
5 16210
6 429672
7 13872026
8 567140800
9 27659216034
10 1597736349560
11 107173173825322
12 8248047045580608
13 720418094750908658
14 70754645379708307864
15 7752521231225769465210
16 941123321624950265044352
17 125814927060189222097127746
18 18423275946242027309159243256
19 2940809638786511819597887208906
20 509519998644880962798618701505280
21 95446391880475967165359534058573202