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.

A231727 Triangular array read by rows: row n shows the coefficients of the polynomial u(n) = c(0) + c(1)*x + ... + c(n)*x^n which is the denominator of the n-th convergent of the continued fraction [k, k, k, ... ], where k = (x + 1)/(x - 1).

Table of values

n a(n)
1 -1
2 1
3 -1
4 0
5 1
6 -2
7 2
8 -2
9 2
10 -3
11 2
12 0
13 -2
14 3
15 -5
16 5
17 -6
18 6
19 -5
20 5
21 -8
22 8
23 -8
24 0
25 8
26 -8
27 8
28 -13
29 15
30 -21
31 15
32 -15
33 21
34 -15
35 13
36 -21
37 26
38 -38
39 18
40 0
41 -18
42 38
43 -26
44 21
45 -34
46 46
47 -76
48 52
49 -48
50 48
51 -52
52 76
53 -46
54 34
55 -55
56 80
57 -141
58 96
59 -70
60 0
61 70
62 -96
63 141
64 -80

List of values

[-1, 1, -1, 0, 1, -2, 2, -2, 2, -3, 2, 0, -2, 3, -5, 5, -6, 6, -5, 5, -8, 8, -8, 0, 8, -8, 8, -13, 15, -21, 15, -15, 21, -15, 13, -21, 26, -38, 18, 0, -18, 38, -26, 21, -34, 46, -76, 52, -48, 48, -52, 76, -46, 34, -55, 80, -141, 96, -70, 0, 70, -96, 141, -80]