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A033678 as a simple table

n a(n)
1 1
2 0
3 1
4 3
5 38
6 720
7 26614
8 1858122
9 250586792
10 66121926720
11 34442540326456
12 35611003057733928
13 73321307277341501168
14 301201690357187097528960
15 2471354321681605983102370864
16 40525241311304939167532163726672

[1,0,1,3,38,720,26614,1858122,250586792,
 66121926720,34442540326456,35611003057733928,
 73321307277341501168,301201690357187097528960,
 2471354321681605983102370864,
 40525241311304939167532163726672]

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)