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.

A272078 Numbers k such that k^2 + 1 is product of 3 distinct primes.

Table of values

n a(n)
1 13
2 17
3 21
4 23
5 27
6 31
7 33
8 37
9 53
10 55
11 63
12 67
13 72
14 75
15 77
16 81
17 87
18 89
19 91
20 97
21 98
22 103
23 105
24 109
25 111
26 112
27 113
28 115
29 119
30 122
31 125
32 127
33 128
34 129
35 135
36 137
37 138
38 142
39 147
40 148
41 149
42 151
43 153
44 155
45 161
46 162
47 163
48 167
49 172
50 174
51 179
52 185
53 189
54 192
55 197
56 200
57 208

List of values

[13, 17, 21, 23, 27, 31, 33, 37, 53, 55, 63, 67, 72, 75, 77, 81, 87, 89, 91, 97, 98, 103, 105, 109, 111, 112, 113, 115, 119, 122, 125, 127, 128, 129, 135, 137, 138, 142, 147, 148, 149, 151, 153, 155, 161, 162, 163, 167, 172, 174, 179, 185, 189, 192, 197, 200, 208]