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.

A118139 Numbers expressible as the sum of two triangular numbers in at least two different ways.

Table of values

n a(n)
1 6
2 16
3 21
4 31
5 36
6 42
7 46
8 51
9 55
10 56
11 66
12 72
13 76
14 81
15 91
16 94
17 106
18 111
19 120
20 121
21 123
22 126
23 133
24 136
25 141
26 146
27 156
28 157
29 171
30 172
31 174
32 181
33 186
34 191
35 196
36 198
37 210
38 211
39 216
40 225
41 226
42 231
43 237
44 241
45 246
46 256
47 259
48 268
49 276
50 281
51 286
52 289
53 291
54 297
55 301
56 306

List of values

[6, 16, 21, 31, 36, 42, 46, 51, 55, 56, 66, 72, 76, 81, 91, 94, 106, 111, 120, 121, 123, 126, 133, 136, 141, 146, 156, 157, 171, 172, 174, 181, 186, 191, 196, 198, 210, 211, 216, 225, 226, 231, 237, 241, 246, 256, 259, 268, 276, 281, 286, 289, 291, 297, 301, 306]