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A301945 as a simple table

n a(n)
1 0
2 2
3 20
4 947
5 120815
6 58609226
7 86143630040
8 418568449327270
9 6527100767589040926
10 331808147283786972146018
11 54543586667142977292165721500
12 29084806316831133817614992597097070

[0,2,20,947,120815,58609226,86143630040,
 418568449327270,6527100767589040926,
 331808147283786972146018,
 54543586667142977292165721500,
 29084806316831133817614992597097070]

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Last modified January 28 17:43 EST 2022. Contains 350657 sequences. (Running on oeis4.)