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.

A003306 Numbers k such that 2*3^k + 1 is prime.

Table of values

n a(n)
1 0
2 1
3 2
4 4
5 5
6 6
7 9
8 16
9 17
10 30
11 54
12 57
13 60
14 65
15 132
16 180
17 320
18 696
19 782
20 822
21 897
22 1252
23 1454
24 4217
25 5480
26 6225
27 7842
28 12096
29 13782
30 17720
31 43956
32 64822
33 82780
34 105106
35 152529
36 165896
37 191814
38 529680
39 1074726
40 1086112
41 1175232
42 1277862
43 1346542
44 3123036
45 3648969
46 5570081
47 6236772
48 10852677

List of values

[0, 1, 2, 4, 5, 6, 9, 16, 17, 30, 54, 57, 60, 65, 132, 180, 320, 696, 782, 822, 897, 1252, 1454, 4217, 5480, 6225, 7842, 12096, 13782, 17720, 43956, 64822, 82780, 105106, 152529, 165896, 191814, 529680, 1074726, 1086112, 1175232, 1277862, 1346542, 3123036, 3648969, 5570081, 6236772, 10852677]

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

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