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A074477 as a simple table

na(n)
12
22
313
45
511
613
71093
841
9757
1061
113851
1273
13797161
141093
154561
16193
1734511
18757
19363889
201181
21368089
223851
231001523179
246481
25391151
26797161
278209
2816493
2920381027
304561
314404047
3221523361
332413941289
3434511
352664097031
36530713

[2,2,13,5,11,13,1093,41,757,61,3851,73,797161,
 1093,4561,193,34511,757,363889,1181,368089,3851,
 1001523179,6481,391151,797161,8209,16493,20381027,
 4561,4404047,21523361,2413941289,34511,2664097031,
 530713]