# A009824 (b-file synthesized from sequence entry)
0 0
1 1
2 0
3 -5
4 12
5 -14
6 120
7 -1238
8 6608
9 -30092
10 279360
11 -3130852
12 26571600
13 -212970328
14 2311816416
15 -27582585592
16 262039232640
17 -1763092281712
18 1470511954944
19 439606528588592
20 -18342263739368000
21 558461845910267936
22 -15219479141544881280
23 406782245791659905440