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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.

A253827 a(n) is the number of primes of the form x^2 + x + prime(n) for 0 <= x <=prime(n).

Table of values

n a(n)
1 1
2 2
3 4
4 4
5 10
6 4
7 16
8 6
9 10
10 13
11 14
12 16
13 40
14 8
15 26
16 19
17 34
18 21
19 36
20 28
21 18
22 18
23 34
24 27
25 31
26 68
27 16
28 71
29 30
30 23
31 37
32 37
33 67
34 44
35 54
36 55
37 54
38 26
39 65
40 50
41 70
42 68
43 79
44 43
45 60
46 70
47 52
48 51
49 132
50 38
51 60
52 100
53 59
54 111
55 114
56 84
57 77
58 68
59 78
60 105
61 49
62 67
63 124
64 145
65 35

List of values

[1, 2, 4, 4, 10, 4, 16, 6, 10, 13, 14, 16, 40, 8, 26, 19, 34, 21, 36, 28, 18, 18, 34, 27, 31, 68, 16, 71, 30, 23, 37, 37, 67, 44, 54, 55, 54, 26, 65, 50, 70, 68, 79, 43, 60, 70, 52, 51, 132, 38, 60, 100, 59, 111, 114, 84, 77, 68, 78, 105, 49, 67, 124, 145, 35]

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

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