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A166721 as a simple table

n a(n)
1 1
2 4
3 16
4 36
5 64
6 144
7 576
8 900
9 1024
10 1296
11 3600
12 4096
13 5184
14 9216
15 14400
16 32400
17 36864
18 44100
19 46656
20 65536
21 82944
22 129600
23 176400
24 230400
25 262144
26 331776
27 589824
28 705600
29 746496
30 810000
31 921600
32 1166400
33 1587600
34 2073600
35 2359296
36 2822400
37 2985984
38 3240000

[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]

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Last modified February 27 22:14 EST 2020. Contains 332312 sequences. (Running on oeis4.)