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A087820 as a simple table

na(n)
07
113
243
3103
4313
53463
615013
7195193
8225223
9765763
104339333
113011753743
129704539843
13100280245063
142707566616753
15124286232650865283
16150451755314205343
1710760571195298599673
18211829530101735290743

[7,13,43,103,313,3463,15013,195193,225223,765763,
 4339333,3011753743,9704539843,100280245063,
 2707566616753,124286232650865283,
 150451755314205343,10760571195298599673,
 211829530101735290743]