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A240799 as a simple table

n a(n)
1 0
2 0
3 1
4 20
5 310
6 4660
7 72485
8 1193080
9 20938764
10 392485560
11 7850724915
12 167242351100
13 3785057708146
14 90775554103052
15 2301045251519105
16 61499717442074800
17 1729026306941190680
18 51022485837639054768
19 1577126907722325214959
20 50967150013960792511700

[0,0,1,20,310,4660,72485,1193080,20938764,
 392485560,7850724915,167242351100,3785057708146,
 90775554103052,2301045251519105,61499717442074800,
 1729026306941190680,51022485837639054768,
 1577126907722325214959,50967150013960792511700]

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Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)