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A203881 as a simple table

na(n)
18281
2254359
37501753
4222645367
56601376089
6195759462871
75804976472057
8172139217677623
95104567195084441
10151369391916622999
114488665070837227833
12133105602855424669687
133947075851161154183129
14117045469473077458995031

[8281,254359,7501753,222645367,6601376089,
 195759462871,5804976472057,172139217677623,
 5104567195084441,151369391916622999,
 4488665070837227833,133105602855424669687,
 3947075851161154183129,117045469473077458995031]