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A206300 as a simple table

n a(n)
0 -1
1 2
2 6
3 32
4 210
5 1536
6 12012
7 98304
8 831402
9 7208960
10 63740820
11 572522496
12 5209363380
13 47915728896
14 444799488600
15 4161823309824
16 39209074920090
17 371626340253696
18 3541117629057540

[-1,2,6,32,210,1536,12012,98304,831402,7208960,
 63740820,572522496,5209363380,47915728896,
 444799488600,4161823309824,39209074920090,
 371626340253696,3541117629057540]

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Last modified March 29 07:27 EDT 2024. Contains 371265 sequences. (Running on oeis4.)