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A061650 as a simple table

na(n)
11
240
31200
432000
5800000
619200000
7448000000
810240000000
9230400000000
105120000000000
11112640000000000
122457600000000000
1353248000000000000
141146880000000000000
1524576000000000000000
16524288000000000000000
1711141120000000000000000
18235929600000000000000000

[1,40,1200,32000,800000,19200000,448000000,
 10240000000,230400000000,5120000000000,
 112640000000000,2457600000000000,
 53248000000000000,1146880000000000000,
 24576000000000000000,524288000000000000000,
 11141120000000000000000,235929600000000000000000]