login

A152827 as a simple table

na(n)
01
11
21
32
44
512
648
7240
81440
911520
10115200
111382400
1220736000
13373248000
148211456000
15221709312000
167094697984000
17269598523392000
1812401532076032000
19669682732105728000
2042859694854766592000

[1,1,1,2,4,12,48,240,1440,11520,115200,1382400,
 20736000,373248000,8211456000,221709312000,
 7094697984000,269598523392000,12401532076032000,
 669682732105728000,42859694854766592000]