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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.

A131240 T(n,k) = 2*A046854(n,k) - I.

Table of values

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

List of values

[1, 2, 1, 2, 2, 1, 2, 4, 2, 1, 2, 4, 6, 2, 1, 2, 6, 6, 8, 2, 1, 2, 6, 12, 8, 10, 2, 1, 2, 8, 12, 20, 10, 12, 2, 1, 2, 8, 20, 20, 30, 12, 14, 2, 1, 2, 10, 20, 40, 30, 42, 14, 16, 2, 1, 2, 10, 30, 40, 70, 42, 56, 16, 18, 2, 1, 2, 12, 30, 70, 70, 112, 56, 72, 18, 20, 2, 1]

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