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.

A092530 a(0) = 0; for n > 0, a(n) = T(n) + k where T(n) is the n-th triangular number (A000217) and k (see A026741) is the smallest positive number such that a(n) is divisible by n.

Table of values

n a(n)
0 0
1 2
2 4
3 9
4 12
5 20
6 24
7 35
8 40
9 54
10 60
11 77
12 84
13 104
14 112
15 135
16 144
17 170
18 180
19 209
20 220
21 252
22 264
23 299
24 312
25 350
26 364
27 405
28 420
29 464
30 480
31 527
32 544
33 594
34 612
35 665
36 684
37 740
38 760
39 819
40 840
41 902
42 924
43 989
44 1012
45 1080
46 1104
47 1175
48 1200
49 1274
50 1300
51 1377
52 1404
53 1484

List of values

[0, 2, 4, 9, 12, 20, 24, 35, 40, 54, 60, 77, 84, 104, 112, 135, 144, 170, 180, 209, 220, 252, 264, 299, 312, 350, 364, 405, 420, 464, 480, 527, 544, 594, 612, 665, 684, 740, 760, 819, 840, 902, 924, 989, 1012, 1080, 1104, 1175, 1200, 1274, 1300, 1377, 1404, 1484]