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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.

A291789 Trajectory of 270 under repeated application of k -> (phi(k)+sigma(k))/2.

Table of values

n a(n)
0 270
1 396
2 606
3 712
4 851
5 852
6 1148
7 1416
8 2032
9 2488
10 2960
11 4110
12 5512
13 6918
14 8076
15 10780
16 16044
17 23784
18 33720
19 55240
20 73230
21 97672
22 118470
23 169840
24 247224
25 350260
26 442848
27 728448
28 1213440
29 2124864
30 4080384
31 8159616
32 13515078
33 15767596
34 18626016
35 29239504
36 39012864
37 62623600
38 92580308

List of values

[270, 396, 606, 712, 851, 852, 1148, 1416, 2032, 2488, 2960, 4110, 5512, 6918, 8076, 10780, 16044, 23784, 33720, 55240, 73230, 97672, 118470, 169840, 247224, 350260, 442848, 728448, 1213440, 2124864, 4080384, 8159616, 13515078, 15767596, 18626016, 29239504, 39012864, 62623600, 92580308]

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

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