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A180461 as a simple table

n a(n)
0 1
1 0
2 0
3 0
4 312399
5 8911029
6 187131609
7 5560483959
8 126501010209
9 3186244194273
10 85514682943809
11 2206011586559697
12 55462952723504823
13 1577373555132452973
14 37744962467192492463
15 974816528291192900817
16 25345238283868264629273
17 658976194648474007782617
18 17245346702665551116114601

[1,0,0,0,312399,8911029,187131609,5560483959,
 126501010209,3186244194273,85514682943809,
 2206011586559697,55462952723504823,
 1577373555132452973,37744962467192492463,
 974816528291192900817,25345238283868264629273,
 658976194648474007782617,
 17245346702665551116114601]

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Last modified July 19 19:50 EDT 2024. Contains 374436 sequences. (Running on oeis4.)