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A065180 as a simple table

na(n)
11
24
320
490
5420
61910
78820
840590
9187880
10871494
114057620
1218945960
1388738020
14416787030
151962922276
169268287390
1743868210820
18208109782580
19989400443220
204713395564772
2122497100553820
22107572434560790
23515241748300020

[1,4,20,90,420,1910,8820,40590,187880,871494,
 4057620,18945960,88738020,416787030,1962922276,
 9268287390,43868210820,208109782580,989400443220,
 4713395564772,22497100553820,107572434560790,
 515241748300020]