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A051575 as a simple table

na(n)
01
11
22
310
470
5210
64620
760060
860060
91021020
1019399380
1119399380
12446185740
132230928700
1413385572200
15388181593800
1612033629407800
1712033629407800
1812033629407800
19445244288088600
20445244288088600
2118255015811632600

[1,1,2,10,70,210,4620,60060,60060,1021020,
 19399380,19399380,446185740,2230928700,
 13385572200,388181593800,12033629407800,
 12033629407800,12033629407800,445244288088600,
 445244288088600,18255015811632600]