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.

A173264 T(0,k) = 1 and T(n,k) = [x^k] ((x - 2)*x^n + 1)/((x - 1)*(x + 1)^n) for n >= 1, square array read by descending antidiagonals (n >= 0, k >= 0).

Table of values

n a(n)
0 1
1 1
2 -1
3 1
4 2
5 -1
6 1
7 -2
8 1
9 -1
10 1
11 2
12 0
13 2
14 -1
15 1
16 -2
17 -1
18 -4
19 3
20 -1
21 1
22 2
23 2
24 8
25 -7
26 4
27 -1
28 1
29 -2
30 -3
31 -14
32 13
33 -11
34 5
35 -1
36 1
37 2
38 4
39 22
40 -20
41 24
42 -16
43 6
44 -1
45 1
46 -2
47 -5
48 -32
49 27
50 -46
51 40
52 -22
53 7
54 -1
55 1
56 2
57 6
58 44
59 -33
60 82
61 -86
62 62
63 -29
64 8
65 -1
66 1
67 -2
68 -7
69 -58
70 37
71 -139
72 166
73 -148
74 91
75 -37
76 9
77 -1

List of values

[1, 1, -1, 1, 2, -1, 1, -2, 1, -1, 1, 2, 0, 2, -1, 1, -2, -1, -4, 3, -1, 1, 2, 2, 8, -7, 4, -1, 1, -2, -3, -14, 13, -11, 5, -1, 1, 2, 4, 22, -20, 24, -16, 6, -1, 1, -2, -5, -32, 27, -46, 40, -22, 7, -1, 1, 2, 6, 44, -33, 82, -86, 62, -29, 8, -1, 1, -2, -7, -58, 37, -139, 166, -148, 91, -37, 9, -1]