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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.

A347078 Primes p such that tau(p - 1) = tau(p - 2) + 1, where tau(k) is the number of divisors of k (A000005).

Table of values

n a(n)
1 3
2 5
3 11
4 17
5 197
6 257
7 59051
8 65537
9 149771
10 178931
11 227531
12 363611
13 3017171
14 4782971
15 5456897
16 7935491
17 10093331
18 15046643
19 15896171
20 20493731
21 26224643
22 27709697
23 28558337
24 29986577
25 51451931
26 55591937
27 71014331
28 72641531
29 83119691
30 87441203
31 98545331
32 116294657

List of values

[3, 5, 11, 17, 197, 257, 59051, 65537, 149771, 178931, 227531, 363611, 3017171, 4782971, 5456897, 7935491, 10093331, 15046643, 15896171, 20493731, 26224643, 27709697, 28558337, 29986577, 51451931, 55591937, 71014331, 72641531, 83119691, 87441203, 98545331, 116294657]

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

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