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.

A358509 Sum of decimal digits of (3^n - 1)/2 (A003462).

Table of values

n a(n)
0 0
1 1
2 4
3 4
4 4
5 4
6 13
7 13
8 13
9 22
10 22
11 31
12 22
13 31
14 31
15 31
16 22
17 31
18 31
19 31
20 31
21 31
22 49
23 49
24 40
25 40
26 49
27 67
28 58
29 58
30 58
31 76
32 58
33 76
34 85
35 85
36 85
37 85
38 94
39 85
40 85
41 94
42 103
43 103
44 85
45 94
46 103
47 112
48 103
49 112
50 130
51 130
52 94
53 121
54 112
55 112
56 121
57 103
58 103
59 121
60 112
61 121
62 121
63 139
64 121
65 148
66 121
67 157
68 157
69 157
70 157
71 175
72 157
73 157

List of values

[0, 1, 4, 4, 4, 4, 13, 13, 13, 22, 22, 31, 22, 31, 31, 31, 22, 31, 31, 31, 31, 31, 49, 49, 40, 40, 49, 67, 58, 58, 58, 76, 58, 76, 85, 85, 85, 85, 94, 85, 85, 94, 103, 103, 85, 94, 103, 112, 103, 112, 130, 130, 94, 121, 112, 112, 121, 103, 103, 121, 112, 121, 121, 139, 121, 148, 121, 157, 157, 157, 157, 175, 157, 157]

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

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