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.

A290639 a(n) = largest number <= prime(n) such that 1 + a(1)*a(2)*...*a(n) is prime.

Table of values

n a(n)
1 2
2 3
3 5
4 7
5 11
6 11
7 16
8 15
9 21
10 22
11 30
12 36
13 41
14 43
15 34
16 36
17 56
18 60
19 48
20 55
21 54
22 59
23 57
24 75
25 42
26 93
27 93
28 103
29 104
30 75
31 126
32 123
33 133
34 129
35 148
36 104
37 146
38 162
39 159
40 128
41 177
42 159
43 153
44 175
45 184
46 187
47 193
48 223
49 210
50 151
51 164
52 170
53 240
54 239
55 254
56 261
57 201
58 261
59 253
60 254
61 170
62 255
63 297
64 257
65 270
66 291
67 309
68 267
69 341
70 310
71 261
72 316
73 363
74 329
75 373
76 361
77 327
78 381
79 373
80 401
81 346
82 351
83 379

List of values

[2, 3, 5, 7, 11, 11, 16, 15, 21, 22, 30, 36, 41, 43, 34, 36, 56, 60, 48, 55, 54, 59, 57, 75, 42, 93, 93, 103, 104, 75, 126, 123, 133, 129, 148, 104, 146, 162, 159, 128, 177, 159, 153, 175, 184, 187, 193, 223, 210, 151, 164, 170, 240, 239, 254, 261, 201, 261, 253, 254, 170, 255, 297, 257, 270, 291, 309, 267, 341, 310, 261, 316, 363, 329, 373, 361, 327, 381, 373, 401, 346, 351, 379]