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.

A135571 Positive integers that are the difference of two positive triangular numbers in an odd number of ways.

Table of values

n a(n)
1 2
2 3
3 4
4 6
5 8
6 9
7 10
8 15
9 16
10 18
11 21
12 25
13 28
14 32
15 45
16 49
17 50
18 55
19 64
20 66
21 72
22 78
23 81
24 91
25 98
26 100
27 105
28 120
29 121
30 128
31 136
32 144
33 153
34 162
35 169
36 171
37 190
38 196
39 200
40 210
41 225
42 231
43 242
44 253
45 256
46 276
47 288
48 289
49 300
50 324
51 325
52 338
53 351
54 361
55 378
56 392
57 400
58 406
59 435

List of values

[2, 3, 4, 6, 8, 9, 10, 15, 16, 18, 21, 25, 28, 32, 45, 49, 50, 55, 64, 66, 72, 78, 81, 91, 98, 100, 105, 120, 121, 128, 136, 144, 153, 162, 169, 171, 190, 196, 200, 210, 225, 231, 242, 253, 256, 276, 288, 289, 300, 324, 325, 338, 351, 361, 378, 392, 400, 406, 435]

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

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