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A107874 as a simple table

na(n)
01
14
215
384
4715
58568
6134596
72629575
861523748
91677106640
1052179482355
111823810410032
1270724320184700
133012192716517082
14139737927523546800
157012067478708989884
16378371310857796292200
1721843987843214746108900

[1,4,15,84,715,8568,134596,2629575,61523748,
 1677106640,52179482355,1823810410032,
 70724320184700,3012192716517082,
 139737927523546800,7012067478708989884,
 378371310857796292200,21843987843214746108900]