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A056790 as a simple table

na(n)
02
15
231
3283
423
5743
6331
71600069
8410353
960042893
108969
117438489991
12116803
134879633159
1461215157711
15338142271
1634041259347101651
1745072130459
186564253087266573169
1922022174223585405703
20121937899012999
2169454092876521107983605569601
225311242856728321929909

[2,5,31,283,23,743,331,1600069,410353,60042893,
 8969,7438489991,116803,4879633159,61215157711,
 338142271,34041259347101651,45072130459,
 6564253087266573169,22022174223585405703,
 121937899012999,69454092876521107983605569601,
 5311242856728321929909]