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A013431 as a simple table

n a(n)
1 0
2 1
3 15
4 495
5 29575
6 2805075
7 387547875
8 73496998575
9 18322452939375
10 5810121991600875
11 2283796491396190875
12 1089828106992320070375
13 620645663306405750934375
14 415796249727049685923771875
15 323721378608985101109612121875
16 289840773808099328924207553609375

[0,1,15,495,29575,2805075,387547875,73496998575,
 18322452939375,5810121991600875,
 2283796491396190875,1089828106992320070375,
 620645663306405750934375,
 415796249727049685923771875,
 323721378608985101109612121875,
 289840773808099328924207553609375]

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Last modified January 24 21:08 EST 2022. Contains 350565 sequences. (Running on oeis4.)