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A019160 as a simple table

n a(n)
3 0
4 0
5 4
6 6
7 8
8 24
9 55
10 122
11 284
12 640
13 1499
14 3523
15 8555
16 21207
17 52142
18 131769
19 340170
20 873080
21 2262490
22 5947043
23 15649920
24 41289048
25 109539183
26 291179345
27 774884877
28 2066087278
29 5516257587
30 14741851755
31 39438287815

[0,0,4,6,8,24,55,122,284,640,1499,3523,8555,21207,
 52142,131769,340170,873080,2262490,5947043,
 15649920,41289048,109539183,291179345,774884877,
 2066087278,5516257587,14741851755,39438287815]

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Last modified January 24 07:18 EST 2020. Contains 331189 sequences. (Running on oeis4.)