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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.

A360033 Table T(n,k), n >= 1 and k >= 0, read by antidiagonals, related to Jacobsthal numbers A001045.

Table of values

n a(n)
1 1
2 2
3 1
4 3
5 3
6 3
7 4
8 5
9 7
10 5
11 5
12 7
13 11
14 13
15 11
16 6
17 9
18 15
19 21
20 27
21 21
22 7
23 11
24 19
25 29
26 43
27 53
28 43
29 8
30 13
31 23
32 37
33 59
34 85
35 107
36 85
37 9
38 15
39 27
40 45
41 75
42 117
43 171
44 213
45 171
46 10
47 17
48 31
49 53
50 91
51 149
52 235
53 341
54 427
55 341
56 11
57 19
58 35
59 61
60 107
61 181
62 299
63 469

List of values

[1, 2, 1, 3, 3, 3, 4, 5, 7, 5, 5, 7, 11, 13, 11, 6, 9, 15, 21, 27, 21, 7, 11, 19, 29, 43, 53, 43, 8, 13, 23, 37, 59, 85, 107, 85, 9, 15, 27, 45, 75, 117, 171, 213, 171, 10, 17, 31, 53, 91, 149, 235, 341, 427, 341, 11, 19, 35, 61, 107, 181, 299, 469]