# A373829 (b-file synthesized from sequence entry)
1 0
2 0
3 1
4 0
5 6
6 2
7 36
8 24
9 246
10 240
11 1920
12 2424
13 16920
14 25920
15 166440
16 297360
17 1809360
18 3669840
19 21551040
20 48666240
21 279180720
22 691649280
23 3908580480
24 10501787520
25 58813776000
26 169809696000
27 946627274880
28 2914924320000
29 16228733875200
30 52963370208000