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A180991 as a simple table

n a(n)
1 0
2 0
3 4
4 196
5 17630
6 3673129
7 1986193307
8 3003748718884
9 13426920301736657
10 185166591284225200707
11 8146406517582852344067961
12 1173623326436235078315237985776

[0,0,4,196,17630,3673129,1986193307,3003748718884,
 13426920301736657,185166591284225200707,
 8146406517582852344067961,
 1173623326436235078315237985776]

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Last modified April 23 09:45 EDT 2024. Contains 371905 sequences. (Running on oeis4.)