# A280982 (b-file synthesized from sequence entry)
1 1
2 1
3 2
4 6
5 54
6 486
7 9720
8 204120
9 6531840
10 241678080
11 13050616320
12 652530816000
13 50244872832000
14 4069834699392000
15 390704131141632000
16 41023933769871360000
17 5538231058932633600000
18 731046499779107635200000
19 124277904962448297984000000