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.

A081843 a(1)=0, a(n)=a(n-1)+5 if n is already in the sequence, a(n)=a(n-1)+4 otherwise.

Table of values

n a(n)
1 0
2 4
3 8
4 13
5 17
6 21
7 25
8 30
9 34
10 38
11 42
12 46
13 51
14 55
15 59
16 63
17 68
18 72
19 76
20 80
21 85
22 89
23 93
24 97
25 102
26 106
27 110
28 114
29 118
30 123
31 127
32 131
33 135
34 140
35 144
36 148
37 152
38 157
39 161
40 165
41 169
42 174
43 178
44 182
45 186
46 191
47 195
48 199
49 203
50 207
51 212
52 216
53 220
54 224
55 229
56 233
57 237
58 241

List of values

[0, 4, 8, 13, 17, 21, 25, 30, 34, 38, 42, 46, 51, 55, 59, 63, 68, 72, 76, 80, 85, 89, 93, 97, 102, 106, 110, 114, 118, 123, 127, 131, 135, 140, 144, 148, 152, 157, 161, 165, 169, 174, 178, 182, 186, 191, 195, 199, 203, 207, 212, 216, 220, 224, 229, 233, 237, 241]