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.

A337637 Number of numbers k <= n such that both k and k+1 are in A020899.

Table of values

n a(n)
0 0
1 1
2 2
3 2
4 2
5 2
6 2
7 2
8 2
9 2
10 2
11 2
12 3
13 3
14 3
15 3
16 3
17 3
18 3
19 4
20 5
21 5
22 5
23 5
24 5
25 5
26 5
27 6
28 6
29 6
30 7
31 8
32 8
33 8
34 8
35 8
36 8
37 8
38 8
39 8
40 9
41 9
42 9
43 10
44 11
45 11
46 11
47 11
48 12
49 13
50 13
51 13
52 13
53 13
54 13
55 13
56 13
57 13
58 13
59 13
60 13
61 14
62 14
63 14
64 15
65 16
66 16
67 16
68 16
69 17
70 18
71 18
72 18
73 18
74 18
75 18
76 18
77 19
78 20
79 20
80 20

List of values

[0, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 10, 11, 11, 11, 11, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 15, 16, 16, 16, 16, 17, 18, 18, 18, 18, 18, 18, 18, 19, 20, 20, 20]

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

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