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A181689 as a simple table

n a(n)
1 1
2 0
3 8
4 0
5 86
6 0
7 948
8 0
9 10444
10 0
11 115056
12 0
13 1267512
14 0
15 13963520
16 0
17 153828832
18 0
19 1694652176
20 0
21 18669100976
22 0
23 205667768400
24 0
25 2265734756752
26 0
27 24960420526224
28 0
29 274975961325264
30 0
31 3029267044091408
32 0
33 33371858326057936
34 0
35 367640393509287824
36 0
37 4050102862690348880
38 0
39 44617875206245953552
40 0
41 491531908055724064720
42 0
43 5414951194338345409680
44 0
45 59653698888134291413584
46 0
47 657173751585588653678864
48 0
49 7239741169830151881286864

[1,0,8,0,86,0,948,0,10444,0,115056,0,1267512,0,
 13963520,0,153828832,0,1694652176,0,18669100976,0,
 205667768400,0,2265734756752,0,24960420526224,0,
 274975961325264,0,3029267044091408,0,
 33371858326057936,0,367640393509287824,0,
 4050102862690348880,0,44617875206245953552,0,
 491531908055724064720,0,5414951194338345409680,0,
 59653698888134291413584,0,
 657173751585588653678864,0,
 7239741169830151881286864]

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Last modified April 24 04:14 EDT 2024. Contains 371918 sequences. (Running on oeis4.)