login

A015167 as a simple table

na(n)
01
12
2-2
344
4340
528136
6-1006568
7437583728
879514299024
9171089734764320
10-154959265326020384
111670488101437425694912
127569711508409229239910208
13407849146892525224567929125504
14-9239554802939536369959859006659200

[1,2,-2,44,340,28136,-1006568,437583728,
 79514299024,171089734764320,-154959265326020384,
 1670488101437425694912,7569711508409229239910208,
 407849146892525224567929125504,
 -9239554802939536369959859006659200]