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A260320 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 1
6 0
7 4
8 11
9 42
10 89
11 329
12 1765
13 9197
14 45647
15 284743
16 1846189
17 11975869
18 83259065
19 621001708
20 4878630533
21 39333230881
22 336375931369
23 3029241762900
24 28439270037332
25 275986675209470
26 2789712437580722

[0,0,0,0,1,0,4,11,42,89,329,1765,9197,45647,
 284743,1846189,11975869,83259065,621001708,
 4878630533,39333230881,336375931369,3029241762900,
 28439270037332,275986675209470,2789712437580722]

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Last modified March 29 08:59 EDT 2024. Contains 371268 sequences. (Running on oeis4.)