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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.

A377366 Rectangular array by antidiagonals: R(m,n) = least k such that 2n*prime(m)^k - 1 is prime.

Table of values

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

List of values

[1, 1, 1, 1, 1, 4, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 2, 4, 1, 2, 4, 2, 3, 1, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 2, 1, 2, 1, 1, 6, 2, 1, 1, 1, 2, 1, 2, 1, 5, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 3, 1, 1, 2, 2, 1, 4, 10, 4, 6, 2, 1, 2, 1]

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