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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A303979 Triangle read by rows: T(n,k) is the number of cyclic unimodal permutations of length n with a peak at position k.

Table of values

n a(n)
1 0
2 0
3 0
4 0
5 1
6 0
7 0
8 1
9 1
10 0
11 0
12 1
13 1
14 1
15 0
16 0
17 1
18 1
19 2
20 1
21 0
22 0
23 1
24 2
25 3
26 2
27 1
28 0
29 0
30 1
31 3
32 4
33 4
34 3
35 1
36 0
37 0
38 1
39 3
40 6
41 8
42 6
43 3
44 1
45 0
46 0
47 1
48 3
49 9
50 13
51 12
52 8
53 4
54 1
55 0
56 0
57 1
58 4
59 11
60 19
61 23
62 19
63 11
64 4
65 1
66 0
67 0
68 1
69 5
70 13
71 27
72 39
73 39
74 27
75 13
76 5
77 1
78 0

List of values

[0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 1, 1, 2, 1, 0, 0, 1, 2, 3, 2, 1, 0, 0, 1, 3, 4, 4, 3, 1, 0, 0, 1, 3, 6, 8, 6, 3, 1, 0, 0, 1, 3, 9, 13, 12, 8, 4, 1, 0, 0, 1, 4, 11, 19, 23, 19, 11, 4, 1, 0, 0, 1, 5, 13, 27, 39, 39, 27, 13, 5, 1, 0]

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