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A300590 as a simple table

na(n)
01
11
25
3175
418385
53759701
61258735981
7630063839035
8445962163492385
9429694421369414185
10547875295770399220981
11903754519692129905068391
121892423689107542226463430065
134948056864672913520114055888445
1415922007799835205487157437619131485
1562245856465769048392433555378169339891
16292266373167286246870149657443033728860481

[1,1,5,175,18385,3759701,1258735981,630063839035,
 445962163492385,429694421369414185,
 547875295770399220981,903754519692129905068391,
 1892423689107542226463430065,
 4948056864672913520114055888445,
 15922007799835205487157437619131485,
 62245856465769048392433555378169339891,
 292266373167286246870149657443033728860481]