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A217285 as a simple table

n a(n)
0 1
1 1
2 1
3 1
4 4
5 6
6 4
7 1
8 1
9 9
10 36
11 84
12 126
13 126
14 84
15 36
16 9
17 1
18 1
19 16
20 120
21 560
22 1820
23 4368
24 8008
25 11440
26 12870
27 11440
28 8008
29 4368
30 1820
31 560
32 120
33 16
34 1
35 1
36 25
37 300
38 2300
39 12650
40 53130
41 177100
42 480700
43 1081575
44 2042975
45 3268760
46 4457400
47 5200300
48 5200300
49 4457400
50 3268760
51 2042975
52 1081575
53 480700
54 177100
55 53130
56 12650
57 2300
58 300
59 25
60 1

[1,1,1,1,4,6,4,1,1,9,36,84,126,126,84,36,9,1,1,16,
 120,560,1820,4368,8008,11440,12870,11440,8008,
 4368,1820,560,120,16,1,1,25,300,2300,12650,53130,
 177100,480700,1081575,2042975,3268760,4457400,
 5200300,5200300,4457400,3268760,2042975,1081575,
 480700,177100,53130,12650,2300,300,25,1]

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Last modified April 19 13:00 EDT 2021. Contains 343114 sequences. (Running on oeis4.)