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.

A080190 Smallest prime p such that n applications of f lead form p to 2, where f is the mapping of primes > 2 to primes defined by A052248.

Table of values

n a(n)
0 2
1 3
2 5
3 7
4 13
5 23
6 43
7 83
8 163
9 317
10 631
11 1259
12 2503
13 5003
14 9973
15 19937
16 39869
17 119617
18 239233
19 480023
20 960031
21 1920049
22 3840091
23 7680181
24 15360361
25 30720719
26 61441379
27 122882741
28 245765449
29 491530873
30 983061713
31 1966123417

List of values

[2, 3, 5, 7, 13, 23, 43, 83, 163, 317, 631, 1259, 2503, 5003, 9973, 19937, 39869, 119617, 239233, 480023, 960031, 1920049, 3840091, 7680181, 15360361, 30720719, 61441379, 122882741, 245765449, 491530873, 983061713, 1966123417]

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

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