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.

A044449 Numbers n such that string 1,3 occurs in the base 4 representation of n but not of n+1.

Table of values

n a(n)
1 7
2 23
3 31
4 39
5 55
6 71
7 87
8 95
9 103
10 127
11 135
12 151
13 159
14 167
15 183
16 199
17 215
18 223
19 231
20 247
21 263
22 279
23 287
24 295
25 311
26 327
27 343
28 351
29 359
30 383
31 391
32 407
33 415
34 423
35 439
36 511
37 519
38 535
39 543
40 551
41 567
42 583
43 599
44 607
45 615
46 639
47 647
48 663

List of values

[7, 23, 31, 39, 55, 71, 87, 95, 103, 127, 135, 151, 159, 167, 183, 199, 215, 223, 231, 247, 263, 279, 287, 295, 311, 327, 343, 351, 359, 383, 391, 407, 415, 423, 439, 511, 519, 535, 543, 551, 567, 583, 599, 607, 615, 639, 647, 663]