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.

A079449 Primes p such that there is at least one integer x satisfying p = x*tau(x)+1 where tau(x) = A000005(x), the number of divisors of x.

Table of values

n a(n)
1 2
2 5
3 7
4 11
5 13
6 23
7 41
8 47
9 59
10 61
11 73
12 83
13 89
14 107
15 109
16 137
17 157
18 167
19 179
20 193
21 227
22 229
23 233
24 241
25 263
26 271
27 277
28 313
29 337
30 347
31 349
32 359
33 373
34 379
35 383
36 409
37 433
38 449
39 457
40 461
41 467
42 479
43 503
44 563
45 569
46 587
47 709
48 719
49 733
50 809
51 821
52 839
53 853
54 857
55 863

List of values

[2, 5, 7, 11, 13, 23, 41, 47, 59, 61, 73, 83, 89, 107, 109, 137, 157, 167, 179, 193, 227, 229, 233, 241, 263, 271, 277, 313, 337, 347, 349, 359, 373, 379, 383, 409, 433, 449, 457, 461, 467, 479, 503, 563, 569, 587, 709, 719, 733, 809, 821, 839, 853, 857, 863]

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

Content is available under The OEIS End-User License Agreement.