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A121080 as a simple table

na(n)
01
14
237
3541
410625
5258661
67464625
7248318309
89339986689
9391569431365
1018095180332721
11913513359466885
1250008961524486849
132950209091316054309
14186558089772409191985
1512587159519294553302821
16902488447534988078746625
1768518909362619336345906309

[1,4,37,541,10625,258661,7464625,248318309,
 9339986689,391569431365,18095180332721,
 913513359466885,50008961524486849,
 2950209091316054309,186558089772409191985,
 12587159519294553302821,902488447534988078746625,
 68518909362619336345906309]