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.

A074311 a(1) = 1; a(2) = 2; a(n) = smallest number greater than the previous term such that the average of three successive terms is a prime.

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 8
6 9
7 16
8 26
9 27
10 34
11 50
12 57
13 70
14 74
15 75
16 88
17 104
18 111
19 112
20 116
21 153
22 178
23 188
24 207
25 238
26 242
27 243
28 268
29 278
30 285
31 286
32 308
33 327
34 358
35 362
36 381
37 394
38 416
39 417
40 424
41 452
42 453
43 466
44 470
45 501
46 502
47 506
48 519
49 538
50 566
51 567
52 574
53 590
54 597
55 610
56 614
57 615

List of values

[1, 2, 3, 4, 8, 9, 16, 26, 27, 34, 50, 57, 70, 74, 75, 88, 104, 111, 112, 116, 153, 178, 188, 207, 238, 242, 243, 268, 278, 285, 286, 308, 327, 358, 362, 381, 394, 416, 417, 424, 452, 453, 466, 470, 501, 502, 506, 519, 538, 566, 567, 574, 590, 597, 610, 614, 615]

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

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