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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.

A289869 Square array T(n,k) (n>=0, k>=0) read by antidiagonals downwards: T(n,k) = A005836(n) + 2*A005836(k).

Table of values

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

List of values

[0, 2, 1, 6, 3, 3, 8, 7, 5, 4, 18, 9, 9, 6, 9, 20, 19, 11, 10, 11, 10, 24, 21, 21, 12, 15, 12, 12, 26, 25, 23, 22, 17, 16, 14, 13, 54, 27, 27, 24, 27, 18, 18, 15, 27, 56, 55, 29, 28, 29, 28, 20, 19, 29, 28, 60, 57, 57, 30, 33, 30, 30, 21, 33, 30, 30, 62, 61, 59]

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