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A261782 as a simple table

na(n)
116
232
364
4128
5243
6256
7512
81024
92048
102744
114096
126561
138192
1416384
1532768
1665536
17131072
18177147
19185193
20262144
21474552
22524288
23614656
24810000
25941192
261048576
271124864
281419857
291500625
302097152
313241792
324194304

[16,32,64,128,243,256,512,1024,2048,2744,4096,
 6561,8192,16384,32768,65536,131072,177147,185193,
 262144,474552,524288,614656,810000,941192,1048576,
 1124864,1419857,1500625,2097152,3241792,4194304]