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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.

A116990 Indices of triangular numbers whose sum of divisors is square.

Table of values

n a(n)
1 1
2 2
3 11
4 20
5 40
6 68
7 92
8 212
9 236
10 253
11 266
12 321
13 328
14 452
15 582
16 589
17 596
18 668
19 695
20 716
21 782
22 788
23 836
24 928
25 932
26 970
27 991
28 1012
29 1065
30 1076
31 1173
32 1264
33 1300
34 1336
35 1388
36 1436
37 1490
38 1549
39 1796
40 1854
41 1927
42 1995
43 2159
44 2228
45 2252
46 2468
47 2545
48 2588

List of values

[1, 2, 11, 20, 40, 68, 92, 212, 236, 253, 266, 321, 328, 452, 582, 589, 596, 668, 695, 716, 782, 788, 836, 928, 932, 970, 991, 1012, 1065, 1076, 1173, 1264, 1300, 1336, 1388, 1436, 1490, 1549, 1796, 1854, 1927, 1995, 2159, 2228, 2252, 2468, 2545, 2588]

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

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