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A166721 as a simple table

na(n)
11
24
316
436
564
6144
7576
8900
91024
101296
113600
124096
135184
149216
1514400
1632400
1736864
1844100
1946656
2065536
2182944
22129600
23176400
24230400
25262144
26331776
27589824
28705600
29746496
30810000
31921600
321166400
331587600
342073600
352359296
362822400
372985984
383240000

[1,4,16,36,64,144,576,900,1024,1296,3600,4096,
 5184,9216,14400,32400,36864,44100,46656,65536,
 82944,129600,176400,230400,262144,331776,589824,
 705600,746496,810000,921600,1166400,1587600,
 2073600,2359296,2822400,2985984,3240000]