# A194786 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 12
4 108
5 1360
6 21780
7 424998
8 9774912
9 259012080
10 7769656800
11 260283596760
12 9631680917760
13 390185658289128
14 17175153440774784
15 816267894739416000
16 41658264473400852480
17 2272233977181361580160
18 131913883517800157429760
19 8121310193676734923381056