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A221630 as a simple table

na(n)
14
237
3395
43575
530145
6247495
72003761
816117917
9129240286
101034701626
118277555240
1266195137589
13529260702037
144231296692315
1533826548373479
16270415884605246
172161732368363020
1817281016582013451
19138145098446018337

[4,37,395,3575,30145,247495,2003761,16117917,
 129240286,1034701626,8277555240,66195137589,
 529260702037,4231296692315,33826548373479,
 270415884605246,2161732368363020,
 17281016582013451,138145098446018337]