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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.

A257478 Distance of positions of first and last occurrence of n in A256918.

Table of values

n a(n)
1 1
2 2
3 6
4 7
5 1
6 3
7 1
8 4
9 10
10 13
11 1
12 4
13 1
14 1
15 1
16 21
17 1
18 24
19 1
20 27
21 1
22 1
23 1
24 10
25 1
26 1
27 26
28 15
29 1
30 11
31 1
32 22
33 1
34 1
35 1
36 5
37 1
38 1
39 1
40 19
41 1
42 43
43 1
44 2
45 1
46 1
47 1
48 1
49 1
50 55
51 1
52 2
53 1
54 20
55 1
56 39
57 1
58 1
59 1
60 13
61 1
62 1
63 32
64 42
65 1
66 11
67 1
68 2
69 1
70 67
71 1
72 26

List of values

[1, 2, 6, 7, 1, 3, 1, 4, 10, 13, 1, 4, 1, 1, 1, 21, 1, 24, 1, 27, 1, 1, 1, 10, 1, 1, 26, 15, 1, 11, 1, 22, 1, 1, 1, 5, 1, 1, 1, 19, 1, 43, 1, 2, 1, 1, 1, 1, 1, 55, 1, 2, 1, 20, 1, 39, 1, 1, 1, 13, 1, 1, 32, 42, 1, 11, 1, 2, 1, 67, 1, 26]