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A207766 as a simple table

na(n)
121
2441
31087
46459
521547
656651
7235872
8862146
92629798
109529570
1134708948
12114255562
13396908066
141416972222
154828733870
1616634895736
1758487207221
18201993811973
19696619145912
202429011369708
218423471768055
2229119549204363

[21,441,1087,6459,21547,56651,235872,862146,
 2629798,9529570,34708948,114255562,396908066,
 1416972222,4828733870,16634895736,58487207221,
 201993811973,696619145912,2429011369708,
 8423471768055,29119549204363]