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A147835 as a simple table

na(n)
13
212
384
4804
59817
6146574
72587236
852707178
91217117362
1031415926535
11896333048374
1228010755666909
13951510209825447
1434909399009812702
151375684229072362040
1657952155664616982739
172598851929495812212466
18123610386554497718683892
196215388655940089571017997

[3,12,84,804,9817,146574,2587236,52707178,
 1217117362,31415926535,896333048374,
 28010755666909,951510209825447,34909399009812702,
 1375684229072362040,57952155664616982739,
 2598851929495812212466,123610386554497718683892,
 6215388655940089571017997]