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A356203
as a simple table
n
a(n)
0
0
1
43
2
9615
3
2299822
4
507491696
5
118805048562
6
25315296119626
7
5959615271620724
[0,43,9615,2299822,507491696,118805048562, 25315296119626,5959615271620724]