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.

A383363 Composite numbers k all of whose proper divisors have binary weights that are not equal to the binary weight of k.

Table of values

n a(n)
1 15
2 25
3 27
4 39
5 51
6 55
7 57
8 63
9 69
10 77
11 81
12 85
13 87
14 91
15 95
16 99
17 111
18 115
19 117
20 119
21 121
22 123
23 125
24 141
25 143
26 145
27 147
28 159
29 169
30 171
31 175
32 177
33 183
34 185
35 187
36 201
37 203
38 205
39 207
40 209
41 213
42 215
43 219
44 221
45 231
46 235
47 237
48 243
49 245
50 247
51 249
52 253
53 255
54 261
55 265
56 275

List of values

[15, 25, 27, 39, 51, 55, 57, 63, 69, 77, 81, 85, 87, 91, 95, 99, 111, 115, 117, 119, 121, 123, 125, 141, 143, 145, 147, 159, 169, 171, 175, 177, 183, 185, 187, 201, 203, 205, 207, 209, 213, 215, 219, 221, 231, 235, 237, 243, 245, 247, 249, 253, 255, 261, 265, 275]

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

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