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A230572 as a simple table

na(n)
10
20
30
42
560
6868
79088
894014
9952214
109576232
1195959204
12960268542
139603585810
1496019822428
15959931905582
169596196300556
1795928783074542
18958947698251704
199586040720227362
2095825901621540374
21957913418736911646

[0,0,0,2,60,868,9088,94014,952214,9576232,
 95959204,960268542,9603585810,96019822428,
 959931905582,9596196300556,95928783074542,
 958947698251704,9586040720227362,
 95825901621540374,957913418736911646]