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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.

A174222 Number of symmetric primes in the interval [prime(n)^2, prime(n)*prime(n+1)].

Table of values

n a(n)
1 1
2 2
3 2
4 6
5 4
6 7
7 5
8 10
9 18
10 6
11 24
12 18
13 10
14 21
15 35
16 29
17 14
18 33
19 27
20 14
21 44
22 32
23 43
24 64
25 36
26 16
27 36
28 17
29 38
30 133
31 41
32 71
33 16
34 123
35 21
36 71
37 72
38 49
39 90
40 85
41 36
42 158
43 34
44 66
45 31
46 190
47 184
48 73
49 39
50 73
51 109
52 33
53 188
54 109
55 117
56 110
57 35
58 126
59 85
60 36
61 221
62 298
63 99
64 41
65 95
66 320
67 136
68 237

List of values

[1, 2, 2, 6, 4, 7, 5, 10, 18, 6, 24, 18, 10, 21, 35, 29, 14, 33, 27, 14, 44, 32, 43, 64, 36, 16, 36, 17, 38, 133, 41, 71, 16, 123, 21, 71, 72, 49, 90, 85, 36, 158, 34, 66, 31, 190, 184, 73, 39, 73, 109, 33, 188, 109, 117, 110, 35, 126, 85, 36, 221, 298, 99, 41, 95, 320, 136, 237]

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

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