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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.

A099254 Self-convolution of A010892. The g.f. is 1/(Alexander polynomial of granny knot).

Table of values

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

List of values

[1, 2, 1, -2, -4, -2, 3, 6, 3, -4, -8, -4, 5, 10, 5, -6, -12, -6, 7, 14, 7, -8, -16, -8, 9, 18, 9, -10, -20, -10, 11, 22, 11, -12, -24, -12, 13, 26, 13, -14, -28, -14, 15, 30, 15, -16, -32, -16, 17, 34, 17, -18, -36, -18, 19, 38, 19, -20, -40, -20, 21, 42, 21]

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