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A019172 as a simple table

n a(n)
3 0
4 0
5 5
6 3
7 4
8 24
9 36
10 87
11 255
12 530
13 1313
14 3575
15 8397
16 20589
17 54046
18 136731
19 347334
20 903694
21 2349517
22 6123754
23 16067398
24 42311690
25 111788610
26 296037502
27 785670359
28 2090272145
29 5569943701
30 14864225284
31 39738611650

[0,0,5,3,4,24,36,87,255,530,1313,3575,8397,20589,
 54046,136731,347334,903694,2349517,6123754,
 16067398,42311690,111788610,296037502,785670359,
 2090272145,5569943701,14864225284,39738611650]

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Last modified April 23 16:40 EDT 2024. Contains 371916 sequences. (Running on oeis4.)