# A357718 (b-file synthesized from sequence entry)
0 1
1 0
2 -3
3 9
4 -24
5 60
6 -84
7 -756
8 13104
9 -157248
10 1795248
11 -20900880
12 254007936
13 -3250473408
14 43922668608
15 -626830626240
16 9437477107968
17 -149644407564288
18 2493958878657792
19 -43592393744250624
20 797394015216175104
21 -15230735270523601920