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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.

A308005 A modified Sisyphus function: a(n) = concatenation of (number of odd digits in n) (number of digits in n) (number of even digits in n).

Table of values

n a(n)
0 11
1 110
2 11
3 110
4 11
5 110
6 11
7 110
8 11
9 110
10 121
11 220
12 121
13 220
14 121
15 220
16 121
17 220
18 121
19 220
20 22
21 121
22 22
23 121
24 22
25 121
26 22
27 121
28 22
29 121
30 121
31 220
32 121
33 220
34 121
35 220
36 121
37 220
38 121
39 220
40 22
41 121
42 22
43 121
44 22
45 121
46 22
47 121
48 22
49 121
50 121
51 220
52 121
53 220
54 121
55 220
56 121
57 220
58 121
59 220
60 22
61 121
62 22
63 121
64 22

List of values

[11, 110, 11, 110, 11, 110, 11, 110, 11, 110, 121, 220, 121, 220, 121, 220, 121, 220, 121, 220, 22, 121, 22, 121, 22, 121, 22, 121, 22, 121, 121, 220, 121, 220, 121, 220, 121, 220, 121, 220, 22, 121, 22, 121, 22, 121, 22, 121, 22, 121, 121, 220, 121, 220, 121, 220, 121, 220, 121, 220, 22, 121, 22, 121, 22]

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

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