login

A002869 as a simple table

na(n)
01
11
22
36
436
5240
61800
716800
8191520
92328480
1030240000
11479001600
128083152000
13142702560000
142731586457600
1559056027430400
161320663933388800
1730575780537702400
18783699448602470400
1921234672840116736000
20591499300737945600000

[1,1,2,6,36,240,1800,16800,191520,2328480,
 30240000,479001600,8083152000,142702560000,
 2731586457600,59056027430400,1320663933388800,
 30575780537702400,783699448602470400,
 21234672840116736000,591499300737945600000]