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.

A177688 Numbers n such that (n+2)//n - (n+1) is prime, where // represents the concatenation of decimals.

Table of values

n a(n)
1 0
2 1
3 4
4 6
5 7
6 9
7 12
8 13
9 15
10 18
11 19
12 22
13 25
14 28
15 31
16 33
17 39
18 46
19 48
20 49
21 52
22 60
23 61
24 64
25 67
26 73
27 75
28 84
29 85
30 88
31 90
32 99
33 100
34 103
35 106
36 132
37 133
38 135
39 136
40 138
41 142
42 156
43 160
44 163
45 171
46 178
47 181
48 183
49 187
50 190
51 198
52 201
53 202
54 211
55 220
56 222
57 229
58 238
59 241
60 246
61 252

List of values

[0, 1, 4, 6, 7, 9, 12, 13, 15, 18, 19, 22, 25, 28, 31, 33, 39, 46, 48, 49, 52, 60, 61, 64, 67, 73, 75, 84, 85, 88, 90, 99, 100, 103, 106, 132, 133, 135, 136, 138, 142, 156, 160, 163, 171, 178, 181, 183, 187, 190, 198, 201, 202, 211, 220, 222, 229, 238, 241, 246, 252]

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

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