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A220886 as a simple table

n a(n)
0 1
1 1
2 1
3 1
4 2
5 4
6 2
7 1
8 1
9 3
10 9
11 20
12 27
13 27
14 20
15 9
16 3
17 1
18 1
19 4
20 16
21 48
22 133
23 272
24 468
25 636
26 720
27 636
28 468
29 272
30 133
31 48
32 16
33 4
34 1
35 1
36 5
37 25
38 95
39 330
40 1027
41 2780
42 6550
43 13375
44 23700
45 36403
46 48405
47 55800
48 55800
49 48405
50 36403
51 23700
52 13375
53 6550
54 2780
55 1027
56 330
57 95
58 25
59 5
60 1

[1,1,1,1,2,4,2,1,1,3,9,20,27,27,20,9,3,1,1,4,16,
 48,133,272,468,636,720,636,468,272,133,48,16,4,1,
 1,5,25,95,330,1027,2780,6550,13375,23700,36403,
 48405,55800,55800,48405,36403,23700,13375,6550,
 2780,1027,330,95,25,5,1]

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)