# A119619 (b-file synthesized from sequence entry)
1 1
2 1
3 2
4 3
5 24
6 10
7 720
8 315
9 4480
10 4536
11 3628800
12 11550
13 479001600
14 13899600
15 43051008
16 638512875
17 20922789888000
18 1905904000
19 6402373705728000
20 118794043368
21 68108451840000
22 4535772564960000
23 1124000727777607680000