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A271845 as a simple table

n a(n)
1 0
2 2
3 2
4 42
5 580
6 31892
7 3193380
8 800156720
9 442390366776
10 566421064781268
11 1649994557114019556

[0,2,2,42,580,31892,3193380,800156720,
 442390366776,566421064781268,1649994557114019556]

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Last modified March 4 10:26 EST 2024. Contains 370528 sequences. (Running on oeis4.)