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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.

A062784 Numbers k such that sigma(k) + phi(k) is a perfect square.

Table of values

n a(n)
1 2
2 4
3 56
4 110
5 125
6 161
7 287
8 391
9 418
10 423
11 511
12 588
13 609
14 675
15 721
16 799
17 910
18 935
19 1048
20 1057
21 1102
22 1130
23 1281
24 1351
25 1457
26 1485
27 1630
28 1716
29 1799
30 1826
31 1921
32 2047
33 2060
34 2177
35 2255
36 2378
37 2403
38 2449
39 2457
40 2472
41 3199
42 3266
43 3915
44 4010
45 4376
46 4417

List of values

[2, 4, 56, 110, 125, 161, 287, 391, 418, 423, 511, 588, 609, 675, 721, 799, 910, 935, 1048, 1057, 1102, 1130, 1281, 1351, 1457, 1485, 1630, 1716, 1799, 1826, 1921, 2047, 2060, 2177, 2255, 2378, 2403, 2449, 2457, 2472, 3199, 3266, 3915, 4010, 4376, 4417]

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

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