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.

A280724 Expansion of 1/(1 - x) + (1/(1 - x)^2)*Sum_{k>=0} x^(3^k).

Table of values

n a(n)
0 1
1 2
2 3
3 5
4 7
5 9
6 11
7 13
8 15
9 18
10 21
11 24
12 27
13 30
14 33
15 36
16 39
17 42
18 45
19 48
20 51
21 54
22 57
23 60
24 63
25 66
26 69
27 73
28 77
29 81
30 85
31 89
32 93
33 97
34 101
35 105
36 109
37 113
38 117
39 121
40 125
41 129
42 133
43 137
44 141
45 145
46 149
47 153
48 157
49 161
50 165
51 169
52 173
53 177
54 181
55 185
56 189
57 193
58 197
59 201
60 205
61 209
62 213
63 217
64 221
65 225
66 229
67 233
68 237
69 241
70 245

List of values

[1, 2, 3, 5, 7, 9, 11, 13, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63, 66, 69, 73, 77, 81, 85, 89, 93, 97, 101, 105, 109, 113, 117, 121, 125, 129, 133, 137, 141, 145, 149, 153, 157, 161, 165, 169, 173, 177, 181, 185, 189, 193, 197, 201, 205, 209, 213, 217, 221, 225, 229, 233, 237, 241, 245]