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.

A136321 Triangular sequence of coefficients of a polynomial recursion for C_n and B_n Cartan matrices: p(x, n) = (-2 + x)*p(x, n - 1) - p(x, n - 2) p(x,n)=x2-4*x+4-m:m=5;(related sequence: A_n:m=1,G_n,m=3,B_n,C_n,m=2) This triangular sequence is an extension to the Cartan pattern of matrices.

Table of values

n a(n)
1 1
2 -2
3 1
4 -1
5 -4
6 1
7 4
8 6
9 -6
10 1
11 -7
12 -4
13 17
14 -8
15 1
16 10
17 -5
18 -32
19 32
20 -10
21 1
22 -13
23 24
24 42
25 -88
26 51
27 -12
28 1
29 16
30 -56
31 -28
32 186
33 -180
34 74
35 -14
36 1
37 -19
38 104
39 -42
40 -312
41 495
42 -316
43 101
44 -16
45 1
46 22
47 -171
48 216
49 396
50 -1122
51 1053
52 -504
53 132
54 -18
55 1
56 -25
57 260
58 -561
59 -264
60 2145
61 -2912
62 1960
63 -752
64 167
65 -20
66 1

List of values

[1, -2, 1, -1, -4, 1, 4, 6, -6, 1, -7, -4, 17, -8, 1, 10, -5, -32, 32, -10, 1, -13, 24, 42, -88, 51, -12, 1, 16, -56, -28, 186, -180, 74, -14, 1, -19, 104, -42, -312, 495, -316, 101, -16, 1, 22, -171, 216, 396, -1122, 1053, -504, 132, -18, 1, -25, 260, -561, -264, 2145, -2912, 1960, -752, 167, -20, 1]