# A227830 (b-file synthesized from sequence entry)
0 1
1 2
2 12
3 1
4 720
5 1
6 30240
7 1
8 1209600
9 1
10 47900160
11 1
12 1307674368000
13 1
14 74724249600
15 1
16 10670622842880000
17 1
18 5109094217170944000
19 1
20 802857662698291200000
21 1
22 14101100039391805440000
23 1
24 1693824136731743669452800000
25 1
26 186134520519971831808000000
27 1
28 37893265687455865519472640000000
29 1
30 759790291646040068357842010112000000
31 1