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A038584 as a simple table

na(n)
12
23
319
478347
587641
6139241
71959253
89564097
9516916921
101048924213
11155353386241
12178196630873
136433462703963
1412702232868389

[2,3,19,78347,87641,139241,1959253,9564097,
 516916921,1048924213,155353386241,178196630873,
 6433462703963,12702232868389]