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A117613 as a simple table

n a(n)
0 0
1 0
2 1
3 8
4 22
5 256
6 2247
7 21576
8 225102
9 2303014
10 24563283
11 267169300
12 2937239494
13 32814269626
14 370231763542
15 4215902111928

[0,0,1,8,22,256,2247,21576,225102,2303014,
 24563283,267169300,2937239494,32814269626,
 370231763542,4215902111928]

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Last modified February 23 00:28 EST 2020. Contains 332157 sequences. (Running on oeis4.)