login

A040075 as a simple table

na(n)
01
120
2240
32240
417920
5129024
6860160
75406720
832440320
9187432960
101049624576
115725224960
1230534533120
13159719096320
14821412495360
154161823309824
1620809116549120
17102821517066240
18502682972323840
192434043865989120
2011683410556747776
2155635288365465600

[1,20,240,2240,17920,129024,860160,5406720,
 32440320,187432960,1049624576,5725224960,
 30534533120,159719096320,821412495360,
 4161823309824,20809116549120,102821517066240,
 502682972323840,2434043865989120,
 11683410556747776,55635288365465600]