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.

A341622 Numbers that are either already perfect, or a perfect number is eventually reached if we start doubling them.

Table of values

n a(n)
1 3
2 6
3 7
4 14
5 28
6 31
7 62
8 124
9 127
10 248
11 254
12 496
13 508
14 1016
15 2032
16 4064
17 8128
18 8191
19 16382
20 32764
21 65528
22 131056
23 131071
24 262112
25 262142
26 524224
27 524284
28 524287
29 1048448
30 1048568
31 1048574
32 2096896
33 2097136
34 2097148
35 4193792
36 4194272
37 4194296
38 8387584
39 8388544
40 8388592
41 16775168
42 16777088
43 16777184
44 33550336
45 33554176
46 33554368

List of values

[3, 6, 7, 14, 28, 31, 62, 124, 127, 248, 254, 496, 508, 1016, 2032, 4064, 8128, 8191, 16382, 32764, 65528, 131056, 131071, 262112, 262142, 524224, 524284, 524287, 1048448, 1048568, 1048574, 2096896, 2097136, 2097148, 4193792, 4194272, 4194296, 8387584, 8388544, 8388592, 16775168, 16777088, 16777184, 33550336, 33554176, 33554368]

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

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