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.

A229978 Numbers k such that (2*k+1) + phi(2*k+1) <= sigma(2*k+1).

Table of values

n a(n)
1 7
2 22
3 31
4 37
5 52
6 67
7 82
8 94
9 97
10 112
11 115
12 127
13 136
14 142
15 148
16 157
17 172
18 178
19 187
20 199
21 202
22 214
23 217
24 220
25 232
26 241
27 247
28 262
29 277
30 283
31 292
32 304
33 307
34 322
35 325
36 337
37 346
38 352
39 367
40 382
41 388
42 397
43 409
44 412
45 427
46 430
47 442
48 445
49 451
50 457
51 472
52 487
53 502
54 517
55 532
56 535
57 547
58 562
59 577
60 592
61 598
62 607
63 622
64 637
65 643
66 652
67 661
68 667
69 682
70 697
71 712
72 724
73 727
74 742
75 757
76 772
77 787
78 802
79 808
80 817

List of values

[7, 22, 31, 37, 52, 67, 82, 94, 97, 112, 115, 127, 136, 142, 148, 157, 172, 178, 187, 199, 202, 214, 217, 220, 232, 241, 247, 262, 277, 283, 292, 304, 307, 322, 325, 337, 346, 352, 367, 382, 388, 397, 409, 412, 427, 430, 442, 445, 451, 457, 472, 487, 502, 517, 532, 535, 547, 562, 577, 592, 598, 607, 622, 637, 643, 652, 661, 667, 682, 697, 712, 724, 727, 742, 757, 772, 787, 802, 808, 817]