login

A022712 as a simple table

na(n)
01
1-20
2170
3-800
42415
5-6404
621550
7-71080
8178295
9-419200
101203282
11-3294360
127476320
13-17381780
1444919500
15-107605880
16237628435
17-544086720
181273805460
19-2864694880
206256648862
21-13710129840

[1,-20,170,-800,2415,-6404,21550,-71080,178295,
 -419200,1203282,-3294360,7476320,-17381780,
 44919500,-107605880,237628435,-544086720,
 1273805460,-2864694880,6256648862,-13710129840]