cp's OEIS Frontend

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.

A123343 Polygon cycle matrices as their characteristic polynomials to form a triangular array.

Table of values

n a(n)
1 1
2 1
3 -1
4 -1
5 0
6 1
7 2
8 3
9 0
10 -1
11 0
12 0
13 -4
14 0
15 1
16 2
17 -5
18 0
19 5
20 0
21 -1
22 -4
23 0
24 9
25 0
26 -6
27 0
28 1
29 2
30 7
31 0
32 -14
33 0
34 7
35 0
36 -1
37 0
38 0
39 -16
40 0
41 20
42 0
43 -8
44 0
45 1
46 2
47 -9
48 0
49 30
50 0
51 -27
52 0
53 9
54 0
55 -1
56 -4
57 0
58 25
59 0
60 -50
61 0
62 35
63 0
64 -10
65 0
66 1
67 2
68 11
69 0
70 -55
71 0
72 77
73 0
74 -44
75 0
76 11
77 0
78 -1
79 0
80 0
81 -36
82 0
83 105
84 0
85 -112
86 0
87 54
88 0
89 -12
90 0
91 1
92 2
93 -13
94 0
95 91
96 0
97 -182
98 0
99 156
100 0

List of values

[1, 1, -1, -1, 0, 1, 2, 3, 0, -1, 0, 0, -4, 0, 1, 2, -5, 0, 5, 0, -1, -4, 0, 9, 0, -6, 0, 1, 2, 7, 0, -14, 0, 7, 0, -1, 0, 0, -16, 0, 20, 0, -8, 0, 1, 2, -9, 0, 30, 0, -27, 0, 9, 0, -1, -4, 0, 25, 0, -50, 0, 35, 0, -10, 0, 1, 2, 11, 0, -55, 0, 77, 0, -44, 0, 11, 0, -1, 0, 0, -36, 0, 105, 0, -112, 0, 54, 0, -12, 0, 1, 2, -13, 0, 91, 0, -182, 0, 156, 0]