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A218927
as a simple table
n
a(n)
0
0
1
0
2
1
3
8
4
66
5
501
6
6469
7
60428
8
926743
9
11902600
10
240066343
11
3677270225
12
108748156239
13
1980478458627
[0,0,1,8,66,501,6469,60428,926743,11902600, 240066343,3677270225,108748156239,1980478458627]
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Last modified April 19 11:14 EDT 2024. Contains 371791 sequences. (Running on oeis4.)