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.

A128815 Numbers n such that n-th and (n+2)th triangular numbers sum up to a prime.

Table of values

n a(n)
1 1
2 2
3 4
4 5
5 7
6 11
7 13
8 14
9 16
10 19
11 20
12 23
13 26
14 32
15 37
16 40
17 49
18 53
19 56
20 58
21 61
22 65
23 68
24 70
25 74
26 76
27 77
28 79
29 88
30 89
31 98
32 100
33 104
34 109
35 110
36 116
37 118
38 130
39 137
40 140
41 142
42 146
43 149
44 152
45 154
46 160
47 161
48 163
49 166
50 167
51 172
52 175
53 187
54 188
55 191
56 193
57 202
58 205
59 208
60 214
61 217

List of values

[1, 2, 4, 5, 7, 11, 13, 14, 16, 19, 20, 23, 26, 32, 37, 40, 49, 53, 56, 58, 61, 65, 68, 70, 74, 76, 77, 79, 88, 89, 98, 100, 104, 109, 110, 116, 118, 130, 137, 140, 142, 146, 149, 152, 154, 160, 161, 163, 166, 167, 172, 175, 187, 188, 191, 193, 202, 205, 208, 214, 217]

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

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