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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.

A076336 (Provable) SierpiƄski numbers: odd numbers n such that for all k >= 1 the numbers n*2^k + 1 are composite.

Table of values

n a(n)
1 78557
2 271129
3 271577
4 322523
5 327739
6 482719
7 575041
8 603713
9 903983
10 934909
11 965431
12 1259779
13 1290677
14 1518781
15 1624097
16 1639459
17 1777613
18 2131043
19 2131099
20 2191531
21 2510177
22 2541601
23 2576089
24 2931767
25 2931991
26 3083723
27 3098059
28 3555593
29 3608251

List of values

[78557, 271129, 271577, 322523, 327739, 482719, 575041, 603713, 903983, 934909, 965431, 1259779, 1290677, 1518781, 1624097, 1639459, 1777613, 2131043, 2131099, 2191531, 2510177, 2541601, 2576089, 2931767, 2931991, 3083723, 3098059, 3555593, 3608251]