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A068810 as a simple table

n a(n)
1 1
2 9
3 36
4 64
5 100
6 324
7 676
8 900
9 3600
10 6400
11 9216
12 10000
13 32400
14 67600
15 90000
16 99856
17 123904
18 360000
19 640000
20 876096
21 921600
22 1000000
23 3240000
24 3968064
25 6031936
26 6760000
27 9000000
28 9985600
29 12390400
30 28901376
31 36000000
32 64000000

[1,9,36,64,100,324,676,900,3600,6400,9216,10000,
 32400,67600,90000,99856,123904,360000,640000,
 876096,921600,1000000,3240000,3968064,6031936,
 6760000,9000000,9985600,12390400,28901376,
 36000000,64000000]

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Last modified December 5 10:45 EST 2019. Contains 329751 sequences. (Running on oeis4.)