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A137730 as a simple table

na(n)
11
21
37
472
51452
643200
71814760
8101606400
97315680960
10658409472000
1172425043734400
129560105533440000
131491376463456140800
14271430516305428480000
1557000408424183569945600
1613680098021793595392000000
173720986661927868408018944000
181138621918549924531666944000000

[1,1,7,72,1452,43200,1814760,101606400,7315680960,
 658409472000,72425043734400,9560105533440000,
 1491376463456140800,271430516305428480000,
 57000408424183569945600,
 13680098021793595392000000,
 3720986661927868408018944000,
 1138621918549924531666944000000]