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A005720 as a simple table

na(n)
21
310
444
5135
6336
7728
81428
92598
104455
117282
1211440
1317381
1425662
1536960
1652088
1772012
1897869
19130986
20172900
21225379
22290444
23370392
24467820
25585650
26727155
27895986
281096200
291332289
301609210
311932416
322307888
332742168
343242393
353816330
364472412
375219775

[1,10,44,135,336,728,1428,2598,4455,7282,11440,
 17381,25662,36960,52088,72012,97869,130986,172900,
 225379,290444,370392,467820,585650,727155,895986,
 1096200,1332289,1609210,1932416,2307888,2742168,
 3242393,3816330,4472412,5219775]