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.

A263042 a(n) = Sum_{i >= 1} d_i(n) * prime(i) where d_i(n) is the i-th digit of n in base 10, and prime(i) is the i-th prime.

Table of values

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

List of values

[0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36]

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

Content is available under The OEIS End-User License Agreement.