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A254857 as a simple table

na(n)
11
28
3736
45461
5496133
63680776
7334392976
82480837633
9225380369761
101672080883936
11151906034826008
121126980034935301
13102384442092359701
14759582871465509008
1569006962064215612536
16511957728387718136161
1746510590046839230489633
18345058749350450558263576

[1,8,736,5461,496133,3680776,334392976,2480837633,
 225380369761,1672080883936,151906034826008,
 1126980034935301,102384442092359701,
 759582871465509008,69006962064215612536,
 511957728387718136161,46510590046839230489633,
 345058749350450558263576]