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A221402 as a simple table

na(n)
10
27
330
42110
526374
6681300
711554698
8239213277
94414861636
1086099730502
111625526991148
1231160102911062
13591775127780270
1411285743215972044
15214648325661089776
164087126318623042490
1777761170034232040294

[0,7,30,2110,26374,681300,11554698,239213277,
 4414861636,86099730502,1625526991148,
 31160102911062,591775127780270,11285743215972044,
 214648325661089776,4087126318623042490,
 77761170034232040294]