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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.

A370762 Triangle read by rows: T(n,k) = 2 * (k mod 2 + 1) * T(n-1,floor(k/2)) + 1 with T(0,0) = 1 for 0 <= k <= 2^n-1.

Table of values

n a(n)
0 1
1 3
2 5
3 7
4 13
5 11
6 21
7 15
8 29
9 27
10 53
11 23
12 45
13 43
14 85
15 31
16 61
17 59
18 117
19 55
20 109
21 107
22 213
23 47
24 93
25 91
26 181
27 87
28 173
29 171
30 341
31 63
32 125
33 123
34 245
35 119
36 237
37 235
38 469
39 111
40 221
41 219
42 437
43 215
44 429
45 427
46 853
47 95
48 189
49 187
50 373
51 183
52 365
53 363
54 725
55 175
56 349
57 347
58 693
59 343
60 685
61 683
62 1365

List of values

[1, 3, 5, 7, 13, 11, 21, 15, 29, 27, 53, 23, 45, 43, 85, 31, 61, 59, 117, 55, 109, 107, 213, 47, 93, 91, 181, 87, 173, 171, 341, 63, 125, 123, 245, 119, 237, 235, 469, 111, 221, 219, 437, 215, 429, 427, 853, 95, 189, 187, 373, 183, 365, 363, 725, 175, 349, 347, 693, 343, 685, 683, 1365]