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A048099 as a simple table

na(n)
10
20
30
43
515
645
7105
8315
91323
105355
1118315
1263855
13272415
141264263
155409495
1622302735
17101343375
18507711375
192495918223
2011798364735
2158074029055
22309240315615
231670570920095
248792390355903
2546886941456575
26264381946998975
271533013006902975
288785301059346175
2950439885753378303

[0,0,0,3,15,45,105,315,1323,5355,18315,63855,
 272415,1264263,5409495,22302735,101343375,
 507711375,2495918223,11798364735,58074029055,
 309240315615,1670570920095,8792390355903,
 46886941456575,264381946998975,1533013006902975,
 8785301059346175,50439885753378303]