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A027451 as a simple table

n a(n)
1 1
2 1
3 4
4 9
5 144
6 100
7 3600
8 11025
9 78400
10 63504
11 6350400
12 5336100
13 768398400
14 662547600
15 577152576
16 2029052025
17 519437318400
18 463325262400
19 150117385017600
20 135480939978384
21 122885206329600
22 111967718990400
23 54192375991353600
24 49770428644836900

[1,1,4,9,144,100,3600,11025,78400,63504,6350400,
 5336100,768398400,662547600,577152576,2029052025,
 519437318400,463325262400,150117385017600,
 135480939978384,122885206329600,111967718990400,
 54192375991353600,49770428644836900]

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Last modified January 24 13:24 EST 2020. Contains 331193 sequences. (Running on oeis4.)