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.

A215779 Numbers k such that 2*k!! - 1 is prime.

Table of values

n a(n)
1 2
2 3
3 5
4 9
5 11
6 13
7 25
8 35
9 46
10 56
11 68
12 69
13 71
14 84
15 92
16 103
17 110
18 121
19 193
20 259
21 308
22 368
23 406
24 426
25 620
26 627
27 1206
28 1631
29 1845
30 2108
31 2210
32 2786
33 7931
34 8008
35 8367
36 12181
37 12291

List of values

[2, 3, 5, 9, 11, 13, 25, 35, 46, 56, 68, 69, 71, 84, 92, 103, 110, 121, 193, 259, 308, 368, 406, 426, 620, 627, 1206, 1631, 1845, 2108, 2210, 2786, 7931, 8008, 8367, 12181, 12291]