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A061449 as a simple table

na(n)
11
216
364
4441
51024
64096
76084
840401
9100489
10900601
111002001
121004004
134004001
1410004569
1590003169
1690022144
17400040001
181000014129
199000127161
2010000200001
2110000400004
2240000400001
23100000147984
24400000591936

[1,16,64,441,1024,4096,6084,40401,100489,900601,
 1002001,1004004,4004001,10004569,90003169,
 90022144,400040001,1000014129,9000127161,
 10000200001,10000400004,40000400001,100000147984,
 400000591936]