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A368837 as a simple table

na(n)
01
14
233
3496
411905
5416676
620000449
71260028288
8100802263041
99979424041060
101197530884927201
11171246916544589744
1228769481979491076993
135610048986000760013636
141256650972864170243054465
15320445998080363411978888576

[1,4,33,496,11905,416676,20000449,1260028288,
 100802263041,9979424041060,1197530884927201,
 171246916544589744,28769481979491076993,
 5610048986000760013636,1256650972864170243054465,
 320445998080363411978888576]