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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.

A357372 Square array A(n, k), n, k > 0, read by antidiagonals; A(n, k) is the numerator of 1/n + 1/k.

Table of values

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

List of values

[2, 3, 3, 4, 1, 4, 5, 5, 5, 5, 6, 3, 2, 3, 6, 7, 7, 7, 7, 7, 7, 8, 2, 8, 1, 8, 2, 8, 9, 9, 1, 9, 9, 1, 9, 9, 10, 5, 10, 5, 2, 5, 10, 5, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 3, 4, 3, 12, 1, 12, 3, 4, 3, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13]

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