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.

A144717 a(n) = smallest positive integer > a(n-1) such that 2*a(1)*a(2)*...*a(n) + 1 is prime.

Table of values

n a(n)
1 1
2 2
3 3
4 5
5 7
6 8
7 9
8 11
9 12
10 14
11 17
12 20
13 24
14 30
15 34
16 44
17 72
18 85
19 86
20 92
21 115
22 122
23 125
24 132
25 142
26 150
27 161
28 162
29 181
30 186
31 198
32 224
33 248
34 252
35 282
36 283
37 290
38 307
39 319
40 321
41 344
42 350
43 376
44 445
45 476
46 567
47 623
48 676
49 682
50 704
51 741
52 749
53 786
54 803
55 806
56 893
57 1014
58 1046

List of values

[1, 2, 3, 5, 7, 8, 9, 11, 12, 14, 17, 20, 24, 30, 34, 44, 72, 85, 86, 92, 115, 122, 125, 132, 142, 150, 161, 162, 181, 186, 198, 224, 248, 252, 282, 283, 290, 307, 319, 321, 344, 350, 376, 445, 476, 567, 623, 676, 682, 704, 741, 749, 786, 803, 806, 893, 1014, 1046]

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

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