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.

A280149 Numbers k such that 3^k - 2^k is not squarefree.

Table of values

n a(n)
1 10
2 11
3 20
4 22
5 30
6 33
7 40
8 42
9 44
10 50
11 52
12 55
13 57
14 60
15 66
16 70
17 77
18 80
19 84
20 88
21 90
22 99
23 100
24 104
25 110
26 114
27 120
28 121
29 126
30 130
31 132
32 140
33 143
34 150
35 154
36 156
37 160
38 165
39 168
40 170
41 171
42 176
43 180
44 187
45 190
46 198
47 200
48 203
49 208
50 209
51 210
52 220
53 228
54 230
55 231
56 240
57 242
58 250
59 252
60 253
61 260
62 264
63 270
64 272
65 275
66 280
67 285

List of values

[10, 11, 20, 22, 30, 33, 40, 42, 44, 50, 52, 55, 57, 60, 66, 70, 77, 80, 84, 88, 90, 99, 100, 104, 110, 114, 120, 121, 126, 130, 132, 140, 143, 150, 154, 156, 160, 165, 168, 170, 171, 176, 180, 187, 190, 198, 200, 203, 208, 209, 210, 220, 228, 230, 231, 240, 242, 250, 252, 253, 260, 264, 270, 272, 275, 280, 285]

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

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