login

A020980 as a simple table

na(n)
01
130
2604
310200
4156016
52241120
630844864
7411749760
85373888256
968949788160
10873102490624
1110942870149120
12136039563882496
131680275743334400
1420645716733968384
15252607863319265280

[1,30,604,10200,156016,2241120,30844864,411749760,
 5373888256,68949788160,873102490624,
 10942870149120,136039563882496,1680275743334400,
 20645716733968384,252607863319265280]