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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.

A360944 Numbers m such that phi(m) is a triangular number, where phi is the Euler totient function (A000010).

Table of values

n a(n)
1 1
2 2
3 7
4 9
5 11
6 14
7 18
8 22
9 29
10 37
11 57
12 58
13 63
14 67
15 74
16 76
17 79
18 108
19 114
20 126
21 134
22 137
23 143
24 155
25 158
26 175
27 183
28 191
29 211
30 225
31 231
32 244
33 248
34 274
35 277
36 286
37 308
38 310
39 329
40 341
41 350
42 366
43 372
44 379
45 382
46 396
47 417
48 422
49 423
50 450
51 453
52 462
53 554
54 556
55 604
56 623
57 631
58 658
59 682

List of values

[1, 2, 7, 9, 11, 14, 18, 22, 29, 37, 57, 58, 63, 67, 74, 76, 79, 108, 114, 126, 134, 137, 143, 155, 158, 175, 183, 191, 211, 225, 231, 244, 248, 274, 277, 286, 308, 310, 329, 341, 350, 366, 372, 379, 382, 396, 417, 422, 423, 450, 453, 462, 554, 556, 604, 623, 631, 658, 682]

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

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