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A003286 as a simple table

na(n)
21
37
466
5916
616816
7373630
89727010
9289374391
109677492899
11359305262944
1214663732271505
13652463078546373
1431435363120551013
151630394318463367718
1690570555840053284171
175365261686125108336540
18337616338011820295406352
1922490263897737210321234701
201581153614004788257326876764

[1,7,66,916,16816,373630,9727010,289374391,
 9677492899,359305262944,14663732271505,
 652463078546373,31435363120551013,
 1630394318463367718,90570555840053284171,
 5365261686125108336540,337616338011820295406352,
 22490263897737210321234701,
 1581153614004788257326876764]