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A071553 as a simple table

na(n)
12
23
37
45
561
611
7421
813
9121
1071
1127721
1223
13360361
144159
15841
16307
1712252241
181121
19232792561
202393
214398241
22483209
235354228881
244093
251460244241
2611232649
2761934401
287598557
292329089562801
30406639
3172201776446801
326998993

[2,3,7,5,61,11,421,13,121,71,27721,23,360361,4159,
 841,307,12252241,1121,232792561,2393,4398241,
 483209,5354228881,4093,1460244241,11232649,
 61934401,7598557,2329089562801,406639,
 72201776446801,6998993]