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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.

A147992 Sequence S such that 1 is in S and if x is in S, then 4x-1 and 4x+1 are in S.

Table of values

n a(n)
1 1
2 3
3 5
4 11
5 13
6 19
7 21
8 43
9 45
10 51
11 53
12 75
13 77
14 83
15 85
16 171
17 173
18 179
19 181
20 203
21 205
22 211
23 213
24 299
25 301
26 307
27 309
28 331
29 333
30 339
31 341
32 683
33 685
34 691
35 693
36 715
37 717
38 723
39 725
40 811
41 813
42 819
43 821
44 843
45 845
46 851
47 853
48 1195
49 1197
50 1203
51 1205
52 1227
53 1229
54 1235

List of values

[1, 3, 5, 11, 13, 19, 21, 43, 45, 51, 53, 75, 77, 83, 85, 171, 173, 179, 181, 203, 205, 211, 213, 299, 301, 307, 309, 331, 333, 339, 341, 683, 685, 691, 693, 715, 717, 723, 725, 811, 813, 819, 821, 843, 845, 851, 853, 1195, 1197, 1203, 1205, 1227, 1229, 1235]

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

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