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A218690 as a simple table

na(n)
01
15
2181
39797
4616501
545778505
63678753205
7314352091205
828154344881205
92612340741982505
10249415797821914681
1124374175871569953225
122428502737999745059381
13245952659136011117909897
1425260608441078125508484181
152626023605592369669830217797

[1,5,181,9797,616501,45778505,3678753205,
 314352091205,28154344881205,2612340741982505,
 249415797821914681,24374175871569953225,
 2428502737999745059381,245952659136011117909897,
 25260608441078125508484181,
 2626023605592369669830217797]