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A055872 as a simple table

n a(n)
1 0
2 1
3 4
4 9
5 36
6 289
7 1156
8 9801
9 39204
10 332929
11 1331716
12 11309769
13 45239076
14 384199201
15 1536796804
16 13051463049
17 52205852196
18 443365544449
19 1773462177796
20 15061377048201
21 60245508192804

[0,1,4,9,36,289,1156,9801,39204,332929,1331716,
 11309769,45239076,384199201,1536796804,
 13051463049,52205852196,443365544449,
 1773462177796,15061377048201,60245508192804]

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Last modified April 3 19:43 EDT 2020. Contains 333198 sequences. (Running on oeis4.)