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.

A139246 Triangle read by rows: row n lists the proper divisors of n-th perfect number A000396(n).

Table of values

n a(n)
1 1
2 2
3 3
4 1
5 2
6 4
7 7
8 14
9 1
10 2
11 4
12 8
13 16
14 31
15 62
16 124
17 248
18 1
19 2
20 4
21 8
22 16
23 32
24 64
25 127
26 254
27 508
28 1016
29 2032
30 4064
31 1
32 2
33 4
34 8
35 16
36 32
37 64
38 128
39 256
40 512
41 1024
42 2048
43 4096
44 8191
45 16382
46 32764
47 65528
48 131056
49 262112
50 524224
51 1048448
52 2096896
53 4193792
54 8387584
55 16775168
56 1

List of values

[1, 2, 3, 1, 2, 4, 7, 14, 1, 2, 4, 8, 16, 31, 62, 124, 248, 1, 2, 4, 8, 16, 32, 64, 127, 254, 508, 1016, 2032, 4064, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8191, 16382, 32764, 65528, 131056, 262112, 524224, 1048448, 2096896, 4193792, 8387584, 16775168, 1]