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A240681 as a simple table

na(n)
41
510
6105
71295
818865
9320544
106258000
11138437310
123428282880
1394059655690
142833936641536
1593055995703125
163308477732618240
17126642365068676240
185193315990469140480
19227160198500847385884
2010557603840000000000000
21519578655591970045435770

[1,10,105,1295,18865,320544,6258000,138437310,
 3428282880,94059655690,2833936641536,
 93055995703125,3308477732618240,
 126642365068676240,5193315990469140480,
 227160198500847385884,10557603840000000000000,
 519578655591970045435770]