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A230464 as a simple table

na(n)
10
20
3114
41384
516926
6212124
72647098
833046400
9412565142
105150701380
1164304187186
12802809801448
1310022730288270
14125129422257516
151562186333636778
1619503215967524816
17243489156724526214

[0,0,114,1384,16926,212124,2647098,33046400,
 412565142,5150701380,64304187186,802809801448,
 10022730288270,125129422257516,1562186333636778,
 19503215967524816,243489156724526214]