# A263929 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 24
5 120
6 720
7 5018
8 39374
9 337816
10 3092691
11 29659731
12 294107811
13 2988678546
14 30935695794
15 324832481490
16 3450158410649
17 36993206191004
18 399827092167771
19 4351269802153188