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A056438 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 0
6 1
7 1
8 18
9 59
10 630
11 1681
12 28867
13 60083
14 757577
15 3514504
16 21424002
17 64372109
18 1024999230
19 2026631203
20 26920955243
21 105501588415
22 742299898741
23 1974251382095
24 31721456317841
25 74052852505684

[0,0,0,0,0,1,1,18,59,630,1681,28867,60083,757577,
 3514504,21424002,64372109,1024999230,2026631203,
 26920955243,105501588415,742299898741,
 1974251382095,31721456317841,74052852505684]

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Last modified April 25 05:18 EDT 2024. Contains 371964 sequences. (Running on oeis4.)