login

A357718 as a simple table

na(n)
01
10
2-3
39
4-24
560
6-84
7-756
813104
9-157248
101795248
11-20900880
12254007936
13-3250473408
1443922668608
15-626830626240
169437477107968
17-149644407564288
182493958878657792
19-43592393744250624
20797394015216175104
21-15230735270523601920

[1,0,-3,9,-24,60,-84,-756,13104,-157248,1795248,
 -20900880,254007936,-3250473408,43922668608,
 -626830626240,9437477107968,-149644407564288,
 2493958878657792,-43592393744250624,
 797394015216175104,-15230735270523601920]