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A282618 as a simple table

n a(n)
1 0
2 0
3 2
4 6
5 26
6 108
7 492
8 2562
9 14790
10 98874
11 720614
12 5908394
13 52572682
14 516141316
15 5422012074
16 61889630476
17 749456000504

[0,0,2,6,26,108,492,2562,14790,98874,720614,
 5908394,52572682,516141316,5422012074,61889630476,
 749456000504]

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Last modified April 19 07:38 EDT 2024. Contains 371782 sequences. (Running on oeis4.)