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.

A261871 Numbers of the form (2*j-1)*(2^k-1); j>=1, k>=2.

Table of values

n a(n)
1 3
2 7
3 9
4 15
5 21
6 27
7 31
8 33
9 35
10 39
11 45
12 49
13 51
14 57
15 63
16 69
17 75
18 77
19 81
20 87
21 91
22 93
23 99
24 105
25 111
26 117
27 119
28 123
29 127
30 129
31 133
32 135
33 141
34 147
35 153
36 155
37 159
38 161
39 165
40 171
41 175
42 177
43 183
44 189
45 195
46 201
47 203
48 207
49 213
50 217
51 219
52 225
53 231
54 237
55 243
56 245
57 249
58 255
59 259
60 261
61 267
62 273
63 279
64 285
65 287
66 291
67 297
68 301

List of values

[3, 7, 9, 15, 21, 27, 31, 33, 35, 39, 45, 49, 51, 57, 63, 69, 75, 77, 81, 87, 91, 93, 99, 105, 111, 117, 119, 123, 127, 129, 133, 135, 141, 147, 153, 155, 159, 161, 165, 171, 175, 177, 183, 189, 195, 201, 203, 207, 213, 217, 219, 225, 231, 237, 243, 245, 249, 255, 259, 261, 267, 273, 279, 285, 287, 291, 297, 301]