# A346224 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 15
4 114
5 1170
6 15570
7 256410
8 5103000
9 119773080
10 3264445800
11 101784097800
12 3591396824400
13 141958074258000
14 6236035482877200
15 302218901402418000
16 16060366291617648000
17 930654556409161584000
18 58524794739862410960000
19 3976525824684785163792000