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.

A337368 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 have all digits 0 through 9 (with duplicate digits allowed).

Table of values

n a(n)
1 0
2 1
3 2
4 3456789
5 3
6 12
7 4
8 356789
9 24
10 5
11 306789
12 45
13 6
14 103789
15 7
16 102
17 8
18 45679
19 80
20 35679
21 9
22 1028
23 10
24 11
25 306798
26 13
27 42
28 14
29 20
30 13789
31 15
32 204
33 25
34 46
35 3589
36 467
37 16
38 20359
39 17
40 23
41 41
42 208
43 18
44 34567
45 19
46 34576
47 289
48 54
49 21
50 22
51 4056789
52 26
53 305789
54 36
55 145
56 206
57 27
58 3489
59 67
60 1389
61 70
62 112
63 30

List of values

[0, 1, 2, 3456789, 3, 12, 4, 356789, 24, 5, 306789, 45, 6, 103789, 7, 102, 8, 45679, 80, 35679, 9, 1028, 10, 11, 306798, 13, 42, 14, 20, 13789, 15, 204, 25, 46, 3589, 467, 16, 20359, 17, 23, 41, 208, 18, 34567, 19, 34576, 289, 54, 21, 22, 4056789, 26, 305789, 36, 145, 206, 27, 3489, 67, 1389, 70, 112, 30]