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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.

A368952 Irregular triangle T(n,k) read by rows: row n lists the larger number in each pair of triangular numbers (a, b) satisfying a - b = n.

Table of values

n a(n)
1 1
2 3
3 6
4 3
5 10
6 15
7 6
8 21
9 6
10 28
11 10
12 36
13 45
14 15
15 10
16 55
17 10
18 66
19 21
20 78
21 15
22 91
23 28
24 105
25 15
26 120
27 36
28 21
29 15
30 136
31 153
32 45
33 171
34 28
35 21
36 190
37 55
38 210
39 21
40 231
41 66
42 36
43 21
44 253
45 28
46 276
47 78
48 300
49 45
50 325
51 91
52 28
53 351
54 36
55 378
56 105
57 55
58 28
59 406
60 28
61 435
62 120
63 465
64 66
65 45
66 36

List of values

[1, 3, 6, 3, 10, 15, 6, 21, 6, 28, 10, 36, 45, 15, 10, 55, 10, 66, 21, 78, 15, 91, 28, 105, 15, 120, 36, 21, 15, 136, 153, 45, 171, 28, 21, 190, 55, 210, 21, 231, 66, 36, 21, 253, 28, 276, 78, 300, 45, 325, 91, 28, 351, 36, 378, 105, 55, 28, 406, 28, 435, 120, 465, 66, 45, 36]

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

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