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A240685 as a simple table

na(n)
81
936
10990
1126070
12705375
1320151846
14614506893
1520073049425
16702495121185
1726300384653400
181050925859466912
1944702294310795888
202018603140944000000
2196508616036970572820
224872478522317533107200
23259140537891648535707618
2414485018396686799073181696

[1,36,990,26070,705375,20151846,614506893,
 20073049425,702495121185,26300384653400,
 1050925859466912,44702294310795888,
 2018603140944000000,96508616036970572820,
 4872478522317533107200,259140537891648535707618,
 14485018396686799073181696]