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.

A191287 Increasing sequence generated by these rules: a(1)=1, and if x is in a then floor(3x/2) and 3x are in a.

Table of values

n a(n)
1 1
2 3
3 4
4 6
5 9
6 12
7 13
8 18
9 19
10 27
11 28
12 36
13 39
14 40
15 42
16 54
17 57
18 58
19 60
20 63
21 81
22 84
23 85
24 87
25 90
26 94
27 108
28 117
29 120
30 121
31 126
32 127
33 130
34 135
35 141
36 162
37 171
38 174
39 175
40 180
41 181
42 189
43 190
44 195
45 202
46 211
47 243
48 252
49 255
50 256
51 261
52 262
53 270
54 271
55 282
56 283
57 285
58 292
59 303
60 316
61 324
62 351
63 360
64 363
65 364
66 378
67 381
68 382
69 384
70 390
71 391
72 393
73 405

List of values

[1, 3, 4, 6, 9, 12, 13, 18, 19, 27, 28, 36, 39, 40, 42, 54, 57, 58, 60, 63, 81, 84, 85, 87, 90, 94, 108, 117, 120, 121, 126, 127, 130, 135, 141, 162, 171, 174, 175, 180, 181, 189, 190, 195, 202, 211, 243, 252, 255, 256, 261, 262, 270, 271, 282, 283, 285, 292, 303, 316, 324, 351, 360, 363, 364, 378, 381, 382, 384, 390, 391, 393, 405]