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A099448 as a simple table

na(n)
01
15
219
365
4216
5715
62369
77855
826051
986400
10286549
11950345
123151831
1310453085
1434667784
15114976135
16381319781
171264651795
184194233399
1913910227200
2046133441401
21153002131805
22507433471819
231682909416265
245581389996216

[1,5,19,65,216,715,2369,7855,26051,86400,286549,
 950345,3151831,10453085,34667784,114976135,
 381319781,1264651795,4194233399,13910227200,
 46133441401,153002131805,507433471819,
 1682909416265,5581389996216]