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A297050 as a simple table

na(n)
21
37
47727
5157594295
625307171607331423
7248623620604452326072191369
81222687716170419330982627155048858310990681
91489240082317443052675901127621355415416483610007972990833417

[1,7,7727,157594295,25307171607331423,
 248623620604452326072191369,
 1222687716170419330982627155048858310990681,
 14892400823174430526759011276213554154164836100079\
 72990833417]