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A107720 as a simple table

na(n)
01
11
25
343
4509
57579
6135341
72813851
866733853
91778159275
1052604224205
111711276244731
1260729274013309
132335153500391627
1496727188777453869
154294441686826824091
16203456100846249179357
1710245810557884742785387

[1,1,5,43,509,7579,135341,2813851,66733853,
 1778159275,52604224205,1711276244731,
 60729274013309,2335153500391627,96727188777453869,
 4294441686826824091,203456100846249179357,
 10245810557884742785387]