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.

A228722 Largest number <= n with alternating parities of digits in decimal representation.

Table of values

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

List of values

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 12, 12, 14, 14, 16, 16, 18, 18, 18, 21, 21, 23, 23, 25, 25, 27, 27, 29, 30, 30, 32, 32, 34, 34, 36, 36, 38, 38, 38, 41, 41, 43, 43, 45, 45, 47, 47, 49, 50, 50, 52, 52, 54, 54, 56, 56, 58, 58, 58, 61, 61, 63, 63, 65, 65]

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

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