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.

A071917 Number of pairs (x,y) where x is even, y is odd, 1<=x<=n, 1<=y<=n and x+y is prime.

Table of values

n a(n)
1 0
2 1
3 2
4 4
5 5
6 7
7 9
8 11
9 14
10 18
11 21
12 25
13 28
14 31
15 35
16 40
17 44
18 48
19 52
20 56
21 61
22 67
23 72
24 78
25 84
26 90
27 97
28 104
29 110
30 117
31 124
32 131
33 138
34 146
35 154
36 163
37 172
38 181
39 190
40 200
41 209
42 219
43 228
44 237
45 247
46 257
47 266
48 275
49 285
50 295
51 306
52 318
53 329
54 341
55 354
56 367
57 381
58 395
59 408
60 421

List of values

[0, 1, 2, 4, 5, 7, 9, 11, 14, 18, 21, 25, 28, 31, 35, 40, 44, 48, 52, 56, 61, 67, 72, 78, 84, 90, 97, 104, 110, 117, 124, 131, 138, 146, 154, 163, 172, 181, 190, 200, 209, 219, 228, 237, 247, 257, 266, 275, 285, 295, 306, 318, 329, 341, 354, 367, 381, 395, 408, 421]

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

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