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.

A097488 Write the positive multiples of 3 on labels in numerical order, forming an infinite sequence L. Now consider the succession of single digits of L: 3 6 9 1 2 1 5 1 8 2 1 2 4 2 7 3 0 3 3 3 6 3 9 4 2 .... This sequence is a derangement of L that produces the same succession of digits, subject to the constraint that the smallest unused label must be used that does not lead to a contradiction.

Table of values

n a(n)
1 36
2 9
3 12
4 15
5 18
6 21
7 24
8 27
9 30
10 3
11 336
12 39
13 42
14 45
15 48
16 51
17 54
18 57
19 60
20 6
21 36
22 669
23 72
24 75
25 79
26 81
27 84
28 87
29 90
30 93
31 96
32 99
33 102
34 105
35 108
36 111
37 114
38 117
39 120
40 123
41 126
42 129
43 132
44 135
45 138
46 141
47 144
48 147
49 150
50 153
51 156
52 159
53 162
54 165

List of values

[36, 9, 12, 15, 18, 21, 24, 27, 30, 3, 336, 39, 42, 45, 48, 51, 54, 57, 60, 6, 36, 669, 72, 75, 79, 81, 84, 87, 90, 93, 96, 99, 102, 105, 108, 111, 114, 117, 120, 123, 126, 129, 132, 135, 138, 141, 144, 147, 150, 153, 156, 159, 162, 165]

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

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