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.

A271392 Integers k such that 3*k!!! + 1 is prime where k!!! is A007661(k).

Table of values

n a(n)
1 2
2 4
3 5
4 8
5 9
6 15
7 16
8 23
9 27
10 32
11 34
12 35
13 38
14 40
15 46
16 54
17 57
18 83
19 87
20 97
21 162
22 165
23 223
24 235
25 282
26 488
27 503
28 575
29 673
30 823
31 857
32 885
33 965
34 1112
35 1401
36 2288
37 2569
38 2788
39 3133
40 3539
41 4070
42 4654
43 5020
44 5613
45 6720
46 7773
47 11256
48 18023
49 22196

List of values

[2, 4, 5, 8, 9, 15, 16, 23, 27, 32, 34, 35, 38, 40, 46, 54, 57, 83, 87, 97, 162, 165, 223, 235, 282, 488, 503, 575, 673, 823, 857, 885, 965, 1112, 1401, 2288, 2569, 2788, 3133, 3539, 4070, 4654, 5020, 5613, 6720, 7773, 11256, 18023, 22196]

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

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