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.

A368083 Numbers k such that k^2 + k + 1 and k^2 + k + 2 are both squarefree numbers.

Table of values

n a(n)
1 0
2 3
3 4
4 7
5 8
6 11
7 12
8 16
9 19
10 20
11 23
12 24
13 27
14 28
15 31
16 35
17 36
18 39
19 40
20 43
21 44
22 47
23 48
24 51
25 52
26 55
27 56
28 59
29 60
30 63
31 64
32 71
33 72
34 75
35 76
36 80
37 83
38 84
39 87
40 88
41 91
42 92
43 95
44 96
45 99
46 100
47 103
48 104
49 107
50 111
51 112
52 115
53 119
54 120
55 123
56 124
57 127
58 131
59 132
60 135
61 139
62 140
63 143

List of values

[0, 3, 4, 7, 8, 11, 12, 16, 19, 20, 23, 24, 27, 28, 31, 35, 36, 39, 40, 43, 44, 47, 48, 51, 52, 55, 56, 59, 60, 63, 64, 71, 72, 75, 76, 80, 83, 84, 87, 88, 91, 92, 95, 96, 99, 100, 103, 104, 107, 111, 112, 115, 119, 120, 123, 124, 127, 131, 132, 135, 139, 140, 143]

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

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