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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.

A208459 Triangle T_x = T(n,k) given by (0, 1/x, 1-1/x, 0, 0, 0, 0, 0, 0, 0, ...) DELTA (x, 1/x-1, -1/x, 0, 0, 0, 0, 0, 0, 0, ...) where DELTA is the operator defined in A084938, for x = 0.

Table of values

n a(n)
0 1
1 0
2 0
3 0
4 1
5 1
6 0
7 1
8 0
9 -1
10 0
11 1
12 0
13 1
14 2
15 0
16 1
17 0
18 2
19 0
20 -3
21 0
22 1
23 0
24 3
25 -1
26 0
27 5
28 0
29 1
30 0
31 4
32 -2
33 3
34 2
35 -8
36 0
37 1
38 0
39 5
40 -3
41 7
42 -2
43 -5
44 13
45 0
46 1
47 0
48 6
49 -4
50 12
51 -8
52 2
53 12
54 -21
55 0
56 1
57 0
58 7
59 -5
60 18
61 -16
62 15
63 3
64 -25
65 34

List of values

[1, 0, 0, 0, 1, 1, 0, 1, 0, -1, 0, 1, 0, 1, 2, 0, 1, 0, 2, 0, -3, 0, 1, 0, 3, -1, 0, 5, 0, 1, 0, 4, -2, 3, 2, -8, 0, 1, 0, 5, -3, 7, -2, -5, 13, 0, 1, 0, 6, -4, 12, -8, 2, 12, -21, 0, 1, 0, 7, -5, 18, -16, 15, 3, -25, 34]

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