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A291212 as a simple table

na(n)
13
27
38
418
519
650
7140
8141
9391
101079
1121986
1259824
1359825
14162694
15162695
16442342
171202520
183268920
1924154825
2065659825
21485165015
221318815534
231318815535
2426489121866
2572004899050
26195729609117
27532048240264
281446257063927

[3,7,8,18,19,50,140,141,391,1079,21986,59824,
 59825,162694,162695,442342,1202520,3268920,
 24154825,65659825,485165015,1318815534,1318815535,
 26489121866,72004899050,195729609117,532048240264,
 1446257063927]