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A019217 as a simple table

n a(n)
3 1
4 1
5 0
6 0
7 0
8 4
9 0
10 42
11 20
12 212
13 168
14 1108
15 1040
16 6138
17 6744
18 33790
19 43372
20 183782
21 265568
22 1027274
23 1645108
24 5893322
25 10226872
26 34141810
27 63006428
28 200175872
29 389090792
30 1191645798
31 2416890692
32 7177748368
33 15064197932
34 43619074260

[1,1,0,0,0,4,0,42,20,212,168,1108,1040,6138,6744,
 33790,43372,183782,265568,1027274,1645108,5893322,
 10226872,34141810,63006428,200175872,389090792,
 1191645798,2416890692,7177748368,15064197932,
 43619074260]

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Last modified April 18 15:05 EDT 2024. Contains 371780 sequences. (Running on oeis4.)