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.

A134866 Table read by antidiagonals: T(n,k) = sigma(gcd(n,k)).

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 3
6 1
7 1
8 1
9 1
10 1
11 1
12 3
13 4
14 3
15 1
16 1
17 1
18 1
19 1
20 1
21 1
22 1
23 3
24 1
25 7
26 1
27 3
28 1
29 1
30 1
31 4
32 1
33 1
34 4
35 1
36 1
37 1
38 3
39 1
40 3
41 6
42 3
43 1
44 3
45 1
46 1
47 1
48 1
49 1
50 1
51 1
52 1
53 1
54 1
55 1
56 1
57 3
58 4
59 7
60 1
61 12
62 1
63 7
64 4
65 3
66 1
67 1
68 1
69 1
70 1
71 1
72 1
73 1
74 1
75 1
76 1
77 1
78 1
79 1
80 3
81 1
82 3
83 1
84 3
85 8
86 3
87 1
88 3
89 1
90 3
91 1

List of values

[1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 3, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 7, 1, 3, 1, 1, 1, 4, 1, 1, 4, 1, 1, 1, 3, 1, 3, 6, 3, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 4, 7, 1, 12, 1, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 3, 1, 3, 8, 3, 1, 3, 1, 3, 1]