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A089456 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 0
10 0
11 0
12 0
13 0
14 0
15 0
16 0
17 8
18 179
19 2509
20 25609
21 214932
22 1578984
23 10536260
24 65411645
25 383981499
26 2156114468

[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,179,2509,25609,
 214932,1578984,10536260,65411645,383981499,
 2156114468]

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Last modified May 4 07:22 EDT 2024. Contains 372230 sequences. (Running on oeis4.)