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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.

A342678 a(n) is the number of base-2 lunar primes less than or equal to n.

Table of values

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

List of values

[0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 8, 8, 8, 8, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, 20, 21, 21, 22, 22, 23, 23, 24]

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

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