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A174646 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 2
10 100
11 908
12 4872
13 19818
14 66864
15 193926
16 498924
17 1165544
18 2517036
19 5089430
20 9731908
21 17735888
22 30999920
23 52234274
24 85210284
25 135059570
26 208627984
27 314889330
28 465423908
29 674966914
30 962031720
31 1349613074

[0,0,0,0,0,0,0,0,2,100,908,4872,19818,66864,
 193926,498924,1165544,2517036,5089430,9731908,
 17735888,30999920,52234274,85210284,135059570,
 208627984,314889330,465423908,674966914,962031720,
 1349613074]

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Last modified July 9 20:48 EDT 2024. Contains 374191 sequences. (Running on oeis4.)