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.

A089227 Numbers k such that 1 + k*ds(k) is prime, where ds(k) is the sum of digits of k.

Table of values

n a(n)
1 1
2 2
3 4
4 6
5 10
6 11
7 12
8 13
9 14
10 16
11 17
12 18
13 19
14 20
15 22
16 28
17 33
18 34
19 35
20 38
21 44
22 46
23 48
24 50
25 51
26 54
27 56
28 59
29 64
30 68
31 70
32 71
33 78
34 80
35 82
36 84
37 88
38 90
39 91
40 92
41 93
42 94
43 97
44 98
45 99
46 100
47 102
48 104
49 105
50 106
51 107
52 109
53 112
54 116
55 118
56 123
57 128
58 129
59 130
60 136
61 138
62 140
63 144
64 145

List of values

[1, 2, 4, 6, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 22, 28, 33, 34, 35, 38, 44, 46, 48, 50, 51, 54, 56, 59, 64, 68, 70, 71, 78, 80, 82, 84, 88, 90, 91, 92, 93, 94, 97, 98, 99, 100, 102, 104, 105, 106, 107, 109, 112, 116, 118, 123, 128, 129, 130, 136, 138, 140, 144, 145]

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

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