cp's OEIS Frontend

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.

A071642 Numbers n such that x^n + x^(n-1) + x^(n-2) + ... + x + 1 is irreducible over GF(2).

Table of values

n a(n)
1 0
2 1
3 2
4 4
5 10
6 12
7 18
8 28
9 36
10 52
11 58
12 60
13 66
14 82
15 100
16 106
17 130
18 138
19 148
20 162
21 172
22 178
23 180
24 196
25 210
26 226
27 268
28 292
29 316
30 346
31 348
32 372
33 378
34 388
35 418
36 420
37 442
38 460
39 466
40 490
41 508
42 522
43 540
44 546
45 556
46 562
47 586
48 612
49 618
50 652
51 658
52 660
53 676
54 700
55 708
56 756
57 772

List of values

[0, 1, 2, 4, 10, 12, 18, 28, 36, 52, 58, 60, 66, 82, 100, 106, 130, 138, 148, 162, 172, 178, 180, 196, 210, 226, 268, 292, 316, 346, 348, 372, 378, 388, 418, 420, 442, 460, 466, 490, 508, 522, 540, 546, 556, 562, 586, 612, 618, 652, 658, 660, 676, 700, 708, 756, 772]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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