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A092503 as a simple table

na(n)
01
11
22
33
416
525
6216
7343
84096
96561
10100000
11161051
122985984
134826809
14105413504
15170859375
164294967296
176975757441
18198359290368
19322687697779
2010240000000000
2116679880978201
22584318301411328

[1,1,2,3,16,25,216,343,4096,6561,100000,161051,
 2985984,4826809,105413504,170859375,4294967296,
 6975757441,198359290368,322687697779,
 10240000000000,16679880978201,584318301411328]