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.

A122771 Triangle read by rows, 0 <= k <= n: T(n,k) is the coefficient of x^k in the characteristic polynomial of I + A^(-1), where A is the n-step Fibonacci companion matrix and I is the identity matrix.

Table of values

n a(n)
0 1
1 2
2 -1
3 -1
4 -1
5 1
6 2
7 -2
8 2
9 -1
10 -1
11 -2
12 4
13 -3
14 1
15 2
16 -3
17 6
18 -7
19 4
20 -1
21 -1
22 -3
23 9
24 -13
25 11
26 -5
27 1
28 2
29 -4
30 12
31 -22
32 24
33 -16
34 6
35 -1
36 -1
37 -4
38 16
39 -34
40 46
41 -40
42 22
43 -7
44 1
45 2
46 -5
47 20
48 -50
49 80
50 -86
51 62
52 -29
53 8
54 -1
55 -1
56 -5
57 25
58 -70
59 130
60 -166
61 148
62 -91
63 37
64 -9
65 1
66 2
67 -6
68 30
69 -95
70 200
71 -296
72 314
73 -239
74 128
75 -46
76 10
77 -1
78 -1
79 -6
80 36
81 -125

List of values

[1, 2, -1, -1, -1, 1, 2, -2, 2, -1, -1, -2, 4, -3, 1, 2, -3, 6, -7, 4, -1, -1, -3, 9, -13, 11, -5, 1, 2, -4, 12, -22, 24, -16, 6, -1, -1, -4, 16, -34, 46, -40, 22, -7, 1, 2, -5, 20, -50, 80, -86, 62, -29, 8, -1, -1, -5, 25, -70, 130, -166, 148, -91, 37, -9, 1, 2, -6, 30, -95, 200, -296, 314, -239, 128, -46, 10, -1, -1, -6, 36, -125]