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A128977 as a simple table

na(n)
01
11
22
33
420
5115
6270
7385
85240
95625
1021730
11300905
121290540
1320688785
14307710550
15328399335
1610177758160
17178604677415
18377564871150
1910567221422735
2043779145175540
211141273698563775
2226071162562264930

[1,1,2,3,20,115,270,385,5240,5625,21730,300905,
 1290540,20688785,307710550,328399335,10177758160,
 178604677415,377564871150,10567221422735,
 43779145175540,1141273698563775,26071162562264930]