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A111870 as a simple table

na(n)
12
23
37
4113
51129
61327
719609
831397
9155921
10360653
11370261
121357201
132010733
1417051707
1520831323
16191912783
17436273009
182300942549
193842610773
204302407359
2110726904659
2225056082087
23304599508537
24461690510011
251346294310749
261408695493609
271968188556461
282614941710599
2913829048559701
3019581334192423
31218209405436543
321693182318746371

[2,3,7,113,1129,1327,19609,31397,155921,360653,
 370261,1357201,2010733,17051707,20831323,
 191912783,436273009,2300942549,3842610773,
 4302407359,10726904659,25056082087,304599508537,
 461690510011,1346294310749,1408695493609,
 1968188556461,2614941710599,13829048559701,
 19581334192423,218209405436543,1693182318746371]