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A258906 as a simple table

na(n)
151856
2510095
35271330
458411404
5575237942
65661517795
755658584373
8532429444542
95037453136882
1047329532772441
11440718089753305
124071997680549943
1337419648635807601
14342088892989819481

[51856,510095,5271330,58411404,575237942,
 5661517795,55658584373,532429444542,5037453136882,
 47329532772441,440718089753305,4071997680549943,
 37419648635807601,342088892989819481]