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A073878 as a simple table

n a(n)
1 1
2 1
3 5
4 13
5 1
6 690
7 29
8 0
9 9207207756
10 67857
11 935759904202397862281423
12 564640443387152026881790255697618312164921101355730025
13 356814640940769181
14 3694582731098
15 18773346867970684437556028438
16 0

[1,1,5,13,1,690,29,0,9207207756,67857,
 935759904202397862281423,
 56464044338715202688179025569761831216492110135573\
 0025,356814640940769181,3694582731098,
 18773346867970684437556028438,0]

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Last modified January 27 21:49 EST 2023. Contains 359849 sequences. (Running on oeis4.)