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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.

A260427 Binary codes for polynomials (with coefficients 0 or 1) that are irreducible over Q, but reducible over GF(2).

Table of values

n a(n)
1 5
2 17
3 23
4 29
5 43
6 53
7 69
8 71
9 77
10 79
11 81
12 83
13 89
14 101
15 107
16 113
17 121
18 127
19 139
20 149
21 151
22 163
23 169
24 173
25 179
26 181
27 197
28 199
29 205
30 209
31 223
32 227
33 233
34 251
35 257
36 261
37 263
38 265
39 269
40 271
41 275
42 277
43 281
44 289
45 293
46 295
47 305
48 307
49 311
50 317
51 321
52 323
53 327
54 329
55 331
56 337
57 339
58 347
59 349
60 353
61 359
62 367
63 373
64 377
65 383
66 389
67 401

List of values

[5, 17, 23, 29, 43, 53, 69, 71, 77, 79, 81, 83, 89, 101, 107, 113, 121, 127, 139, 149, 151, 163, 169, 173, 179, 181, 197, 199, 205, 209, 223, 227, 233, 251, 257, 261, 263, 265, 269, 271, 275, 277, 281, 289, 293, 295, 305, 307, 311, 317, 321, 323, 327, 329, 331, 337, 339, 347, 349, 353, 359, 367, 373, 377, 383, 389, 401]