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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.

A383596 Integers in Ulam's spiral for which the numbers around them form a square whose four corners are all prime numbers.

Table of values

n a(n)
1 71
2 95
3 353
4 701
5 767
6 1151
7 1451
8 1961
9 2507
10 3347
11 4691
12 5957
13 7205
14 9671
15 13463
16 15635
17 21017
18 26051
19 27947
20 28985
21 34337
22 42017
23 49565
24 50921
25 52253
26 52349
27 55859
28 57191
29 63143
30 75857
31 79907
32 80831
33 81611
34 92339
35 101633
36 102557
37 106529
38 110495
39 114521
40 116513
41 121469
42 131075
43 136757
44 137879
45 144497

List of values

[71, 95, 353, 701, 767, 1151, 1451, 1961, 2507, 3347, 4691, 5957, 7205, 9671, 13463, 15635, 21017, 26051, 27947, 28985, 34337, 42017, 49565, 50921, 52253, 52349, 55859, 57191, 63143, 75857, 79907, 80831, 81611, 92339, 101633, 102557, 106529, 110495, 114521, 116513, 121469, 131075, 136757, 137879, 144497]

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

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