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A186025 as a simple table

n a(n)
0 1
1 0
2 -1
3 -4
4 -12
5 -33
6 -88
7 -232
8 -609
9 -1596
10 -4180
11 -10945
12 -28656
13 -75024
14 -196417
15 -514228
16 -1346268
17 -3524577
18 -9227464
19 -24157816
20 -63245985
21 -165580140
22 -433494436
23 -1134903169
24 -2971215072
25 -7778742048
26 -20365011073
27 -53316291172
28 -139583862444

[1,0,-1,-4,-12,-33,-88,-232,-609,-1596,-4180,
 -10945,-28656,-75024,-196417,-514228,-1346268,
 -3524577,-9227464,-24157816,-63245985,-165580140,
 -433494436,-1134903169,-2971215072,-7778742048,
 -20365011073,-53316291172,-139583862444]

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Last modified April 24 17:20 EDT 2024. Contains 371962 sequences. (Running on oeis4.)