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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.

A337116 Spiral on a 2D square lattice, one term per cell, starting at the origin with 0; the four integers forming any 2 X 2 square add up to a prime.

Table of values

n a(n)
1 0
2 1
3 2
4 4
5 3
6 6
7 5
8 8
9 10
10 7
11 11
12 9
13 12
14 14
15 17
16 13
17 15
18 16
19 18
20 24
21 19
22 23
23 25
24 28
25 22
26 20
27 30
28 31
29 32
30 26
31 21
32 38
33 33
34 37
35 34
36 27
37 29
38 36
39 40
40 35
41 50
42 44
43 39
44 47
45 42
46 41
47 43
48 46
49 49
50 45
51 53
52 48
53 54
54 56
55 59
56 51
57 52
58 55
59 65
60 57
61 64
62 58
63 60
64 63
65 61
66 70
67 62
68 73
69 75
70 67

List of values

[0, 1, 2, 4, 3, 6, 5, 8, 10, 7, 11, 9, 12, 14, 17, 13, 15, 16, 18, 24, 19, 23, 25, 28, 22, 20, 30, 31, 32, 26, 21, 38, 33, 37, 34, 27, 29, 36, 40, 35, 50, 44, 39, 47, 42, 41, 43, 46, 49, 45, 53, 48, 54, 56, 59, 51, 52, 55, 65, 57, 64, 58, 60, 63, 61, 70, 62, 73, 75, 67]

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

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