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.

A272044 Numbers n such that n and n^2+1 have the same number of prime factors (including multiplicities).

Table of values

n a(n)
1 2
2 9
3 15
4 18
5 22
6 25
7 27
8 34
9 35
10 39
11 46
12 49
13 51
14 58
15 62
16 63
17 65
18 69
19 70
20 75
21 85
22 86
23 95
24 98
25 105
26 106
27 121
28 125
29 132
30 138
31 141
32 145
33 147
34 148
35 153
36 158
37 159
38 166
39 169
40 172
41 174
42 178
43 194
44 201
45 202
46 205
47 209
48 212
49 214
50 219
51 221
52 226
53 254
54 262
55 274
56 282
57 285
58 289
59 298
60 299

List of values

[2, 9, 15, 18, 22, 25, 27, 34, 35, 39, 46, 49, 51, 58, 62, 63, 65, 69, 70, 75, 85, 86, 95, 98, 105, 106, 121, 125, 132, 138, 141, 145, 147, 148, 153, 158, 159, 166, 169, 172, 174, 178, 194, 201, 202, 205, 209, 212, 214, 219, 221, 226, 254, 262, 274, 282, 285, 289, 298, 299]

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

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