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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.

A237719 Numbers n such that k(n) = (n(n+1)/2 mod n) = (antisigma(n) mod n) + (sigma(n) mod n).

Table of values

n a(n)
1 1
2 2
3 6
4 12
5 18
6 20
7 24
8 28
9 30
10 40
11 42
12 54
13 56
14 66
15 70
16 78
17 80
18 88
19 100
20 102
21 104
22 112
23 114
24 120
25 126
26 138
27 140
28 150
29 160
30 162
31 174
32 176
33 180
34 186
35 196
36 198
37 200
38 204
39 208
40 220
41 222
42 224
43 228
44 234
45 240
46 246
47 258
48 260
49 272
50 276
51 282
52 294
53 304
54 306
55 308
56 318
57 320

List of values

[1, 2, 6, 12, 18, 20, 24, 28, 30, 40, 42, 54, 56, 66, 70, 78, 80, 88, 100, 102, 104, 112, 114, 120, 126, 138, 140, 150, 160, 162, 174, 176, 180, 186, 196, 198, 200, 204, 208, 220, 222, 224, 228, 234, 240, 246, 258, 260, 272, 276, 282, 294, 304, 306, 308, 318, 320]

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

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