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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.

A260256 Numbers n such that tau(n + 2) = tau(n - 2) where tau(k) = A000005(k).

Table of values

n a(n)
1 5
2 8
3 9
4 12
5 15
6 21
7 24
8 30
9 36
10 37
11 39
12 45
13 53
14 60
15 67
16 68
17 69
18 81
19 84
20 89
21 93
22 99
23 105
24 111
25 112
26 113
27 117
28 120
29 121
30 127
31 129
32 131
33 143
34 144
35 157
36 158
37 165
38 172
39 173
40 184
41 185
42 188
43 195
44 202
45 203
46 204
47 207
48 211
49 215
50 216
51 217
52 219
53 222
54 225
55 226
56 231
57 248
58 251
59 276
60 277
61 279
62 284
63 288

List of values

[5, 8, 9, 12, 15, 21, 24, 30, 36, 37, 39, 45, 53, 60, 67, 68, 69, 81, 84, 89, 93, 99, 105, 111, 112, 113, 117, 120, 121, 127, 129, 131, 143, 144, 157, 158, 165, 172, 173, 184, 185, 188, 195, 202, 203, 204, 207, 211, 215, 216, 217, 219, 222, 225, 226, 231, 248, 251, 276, 277, 279, 284, 288]

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

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