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A320399 as a simple table

na(n)
116
2338
33694
446516
5561290
66845143
783509525
81016183713
912380173295
10150735949441
111835742312808
1222354942809197
13272235088796050
143315230248832552
1540372220823851110
16491645689998207688

[16,338,3694,46516,561290,6845143,83509525,
 1016183713,12380173295,150735949441,1835742312808,
 22354942809197,272235088796050,3315230248832552,
 40372220823851110,491645689998207688]