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A108975 as a simple table

n a(n)
1 3
2 15
3 165
4 2145
5 40755
6 1181895
7 43730115
8 2317696095
9 136744069605
10 8341388245905
11 558873012475635
12 46386460035477705
13 4685032463583248205
14 501298473603407557935
15 65670100042046390089485

[3,15,165,2145,40755,1181895,43730115,2317696095,
 136744069605,8341388245905,558873012475635,
 46386460035477705,4685032463583248205,
 501298473603407557935,65670100042046390089485]

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Last modified July 28 06:08 EDT 2021. Contains 346317 sequences. (Running on oeis4.)