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.

A271816 Deficient-perfect numbers: Deficient numbers n such that n/(2n-sigma(n)) is an integer.

Table of values

n a(n)
1 1
2 2
3 4
4 8
5 10
6 16
7 32
8 44
9 64
10 128
11 136
12 152
13 184
14 256
15 512
16 752
17 884
18 1024
19 2048
20 2144
21 2272
22 2528
23 4096
24 8192
25 8384
26 12224
27 16384
28 17176
29 18632
30 18904
31 32768
32 32896
33 33664
34 34688
35 49024
36 63248
37 65536
38 85936
39 106928
40 116624
41 117808
42 131072
43 262144
44 524288
45 526688
46 527872
47 531968
48 556544
49 589312
50 599072
51 654848
52 709784

List of values

[1, 2, 4, 8, 10, 16, 32, 44, 64, 128, 136, 152, 184, 256, 512, 752, 884, 1024, 2048, 2144, 2272, 2528, 4096, 8192, 8384, 12224, 16384, 17176, 18632, 18904, 32768, 32896, 33664, 34688, 49024, 63248, 65536, 85936, 106928, 116624, 117808, 131072, 262144, 524288, 526688, 527872, 531968, 556544, 589312, 599072, 654848, 709784]

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

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