login

A002011 as a simple table

na(n)
04
124
2120
3560
42520
511088
648048
7205920
8875160
93695120
1015519504
1164899744
12270415600
131123264800
144653525600
1519234572480
1679342611480
17326704870800
181343120024400
195513861152800
2022606830726480
2192580354403680
22378737813469600

[4,24,120,560,2520,11088,48048,205920,875160,
 3695120,15519504,64899744,270415600,1123264800,
 4653525600,19234572480,79342611480,326704870800,
 1343120024400,5513861152800,22606830726480,
 92580354403680,378737813469600]