login

A009724 as a simple table

na(n)
02
124
2720
3120960
41209600
595800320
61307674368000
7597793996800
810670622842880000
910218188434341888000
10802857662698291200000
1156404400157567221760000
121693824136731743669452800000

[2,24,720,120960,1209600,95800320,1307674368000,
 597793996800,10670622842880000,
 10218188434341888000,802857662698291200000,
 56404400157567221760000,
 1693824136731743669452800000]