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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.

A131127 Table read by rows: 2*A007318(n,m) - A167374(n,m).

Table of values

n a(n)
0 1
1 3
2 1
3 2
4 5
5 1
6 2
7 6
8 7
9 1
10 2
11 8
12 12
13 9
14 1
15 2
16 10
17 20
18 20
19 11
20 1
21 2
22 12
23 30
24 40
25 30
26 13
27 1
28 2
29 14
30 42
31 70
32 70
33 42
34 15
35 1
36 2
37 16
38 56
39 112
40 140
41 112
42 56
43 17
44 1
45 2
46 18
47 72
48 168
49 252
50 252
51 168
52 72
53 19
54 1
55 2
56 20
57 90
58 240
59 420
60 504
61 420
62 240
63 90
64 21
65 1
66 2
67 22
68 110
69 330
70 660
71 924
72 924
73 660
74 330
75 110
76 23
77 1

List of values

[1, 3, 1, 2, 5, 1, 2, 6, 7, 1, 2, 8, 12, 9, 1, 2, 10, 20, 20, 11, 1, 2, 12, 30, 40, 30, 13, 1, 2, 14, 42, 70, 70, 42, 15, 1, 2, 16, 56, 112, 140, 112, 56, 17, 1, 2, 18, 72, 168, 252, 252, 168, 72, 19, 1, 2, 20, 90, 240, 420, 504, 420, 240, 90, 21, 1, 2, 22, 110, 330, 660, 924, 924, 660, 330, 110, 23, 1]

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