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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.

A189024 Number of primes in the range (n - sqrt(n), n].

Table of values

n a(n)
1 0
2 1
3 2
4 1
5 2
6 1
7 2
8 1
9 1
10 1
11 1
12 1
13 2
14 2
15 1
16 1
17 2
18 1
19 2
20 2
21 2
22 1
23 2
24 1
25 1
26 1
27 1
28 1
29 1
30 1
31 2
32 2
33 2
34 2
35 1
36 1
37 2
38 1
39 1
40 1
41 2
42 2
43 3
44 2
45 2
46 2
47 3
48 2
49 2
50 2
51 1
52 1
53 2
54 2
55 1
56 1
57 1
58 1
59 2
60 2
61 2
62 2
63 2
64 2
65 2
66 2
67 3
68 2
69 2
70 1
71 2
72 2
73 3
74 3
75 3
76 2
77 2
78 2
79 3
80 2
81 2
82 2
83 2
84 2
85 2
86 2
87 2
88 2
89 2
90 2
91 2
92 2
93 1
94 1
95 1
96 1
97 2
98 2
99 1
100 1
101 2
102 2
103 3
104 3
105 3
106 3
107 4
108 3
109 4
110 4
111 4
112 3
113 4
114 3
115 3
116 3
117 3
118 2
119 2
120 1
121 1
122 1
123 1
124 1
125 0
126 0
127 1

List of values

[0, 1, 2, 1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 2, 1, 1, 2, 1, 2, 2, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 1, 1, 2, 1, 1, 1, 2, 2, 3, 2, 2, 2, 3, 2, 2, 2, 1, 1, 2, 2, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 1, 2, 2, 3, 3, 3, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 2, 2, 1, 1, 2, 2, 3, 3, 3, 3, 4, 3, 4, 4, 4, 3, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 0, 0, 1]

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

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