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A321172 as a simple table

n a(n)
2 1
3 1
4 0
5 1
6 2
7 6
8 1
9 0
10 14
11 0
12 1
13 4
14 37
15 154
16 1072
17 1
18 0
19 92
20 0
21 5320
22 0
23 1
24 8
25 236
26 1696
27 32675
28 301384
29 4638576
30 1
31 0
32 596
33 0
34 175294
35 0
36 49483138
37 0
38 1
39 16
40 1517
41 18684
42 1024028
43 17066492
44 681728204
45 13916993782
46 467260456608

[1,1,0,1,2,6,1,0,14,0,1,4,37,154,1072,1,0,92,0,
 5320,0,1,8,236,1696,32675,301384,4638576,1,0,596,
 0,175294,0,49483138,0,1,16,1517,18684,1024028,
 17066492,681728204,13916993782,467260456608]

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Last modified July 12 16:00 EDT 2024. Contains 374251 sequences. (Running on oeis4.)