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.

A221476 Prime numbers having no additional odd primes in their Collatz (3x+1) trajectory.

Table of values

n a(n)
1 2
2 5
3 113
4 227
5 2417
6 3637
7 7253
8 14549
9 14563
10 30559
11 38677
12 38833
13 155333
14 206923
15 207121
16 217309
17 464213
18 466033
19 620771
20 827693
21 915737
22 1100149
23 1100353
24 1220983
25 1303873
26 1472893
27 1656901
28 1963813
29 2327483
30 2475797
31 2933717
32 2933731
33 3313777
34 3491083

List of values

[2, 5, 113, 227, 2417, 3637, 7253, 14549, 14563, 30559, 38677, 38833, 155333, 206923, 207121, 217309, 464213, 466033, 620771, 827693, 915737, 1100149, 1100353, 1220983, 1303873, 1472893, 1656901, 1963813, 2327483, 2475797, 2933717, 2933731, 3313777, 3491083]