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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.

A381368 a(n) is the least k > n for which prime(n) + prime(k) is a square.

Table of values

n a(n)
1 4
2 6
3 5
4 10
5 16
6 9
7 8
8 102
9 13
10 20
11 30
12 28
13 17
14 26
15 16
16 58
17 33
18 23
19 55
20 21
21 54
22 142
23 30
24 28
25 49
26 48
27 139
28 35
29 91
30 47
31 45
32 44
33 56
34 135
35 54
36 40
37 39
38 252
39 51
40 49
41 78
42 128
43 62
44 76
45 75
46 126
47 245
48 71
49 55
50 69
51 54
52 68
53 120
54 137
55 81
56 65
57 63
58 238
59 171
60 96
61 62
62 76
63 108
64 209

List of values

[4, 6, 5, 10, 16, 9, 8, 102, 13, 20, 30, 28, 17, 26, 16, 58, 33, 23, 55, 21, 54, 142, 30, 28, 49, 48, 139, 35, 91, 47, 45, 44, 56, 135, 54, 40, 39, 252, 51, 49, 78, 128, 62, 76, 75, 126, 245, 71, 55, 69, 54, 68, 120, 137, 81, 65, 63, 238, 171, 96, 62, 76, 108, 209]

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

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