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.

A215631 Triangle read by rows: T(n,k) = n^2 + n*k + k^2, 1 <= k <= n.

Table of values

n a(n)
1 3
2 7
3 12
4 13
5 19
6 27
7 21
8 28
9 37
10 48
11 31
12 39
13 49
14 61
15 75
16 43
17 52
18 63
19 76
20 91
21 108
22 57
23 67
24 79
25 93
26 109
27 127
28 147
29 73
30 84
31 97
32 112
33 129
34 148
35 169
36 192
37 91
38 103
39 117
40 133
41 151
42 171
43 193
44 217
45 243
46 111
47 124
48 139
49 156
50 175
51 196
52 219
53 244
54 271
55 300
56 133
57 147
58 163

List of values

[3, 7, 12, 13, 19, 27, 21, 28, 37, 48, 31, 39, 49, 61, 75, 43, 52, 63, 76, 91, 108, 57, 67, 79, 93, 109, 127, 147, 73, 84, 97, 112, 129, 148, 169, 192, 91, 103, 117, 133, 151, 171, 193, 217, 243, 111, 124, 139, 156, 175, 196, 219, 244, 271, 300, 133, 147, 163]