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.

A181902 Numbers k such that the k-th triangular number is prime or the arithmetic mean of 2 successive primes.

Table of values

n a(n)
1 2
2 3
3 5
4 6
5 9
6 14
7 15
8 21
9 24
10 26
11 30
12 38
13 39
14 41
15 48
16 53
17 54
18 78
19 80
20 81
21 87
22 89
23 92
24 104
25 116
26 117
27 119
28 121
29 122
30 125
31 126
32 146
33 149
34 150
35 153
36 156
37 158
38 164
39 165
40 170
41 171
42 185
43 186
44 194
45 206
46 210
47 218
48 245
49 248
50 252
51 255
52 258
53 270
54 281
55 285
56 290
57 296
58 297

List of values

[2, 3, 5, 6, 9, 14, 15, 21, 24, 26, 30, 38, 39, 41, 48, 53, 54, 78, 80, 81, 87, 89, 92, 104, 116, 117, 119, 121, 122, 125, 126, 146, 149, 150, 153, 156, 158, 164, 165, 170, 171, 185, 186, 194, 206, 210, 218, 245, 248, 252, 255, 258, 270, 281, 285, 290, 296, 297]

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

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