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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.

A300691 Square array T(n, k) (n >= 1, k >= 1) read by antidiagonals upwards: T(n, k) is the k-th positive number, say m, such that the binary representation of n appears as a substring in the binary representation of 1/m (ignoring the radix point and adding trailing zeros if necessary in case of a terminating expansion).

Table of values

n a(n)
1 1
2 1
3 2
4 5
5 2
6 3
7 1
8 9
9 3
10 4
11 3
12 2
13 10
14 4
15 5
16 5
17 6
18 4
19 11
20 5
21 6
22 9
23 9
24 11
25 5
26 13
27 6
28 7
29 1
30 11
31 10
32 12
33 7
34 17
35 7
36 8
37 5
38 2
39 13
40 11
41 13
42 8
43 18
44 8
45 9
46 3
47 7
48 4
49 17
50 13
51 19
52 9
53 19
54 9
55 10
56 11
57 6
58 10
59 8
60 18
61 17
62 22
63 10
64 20
65 10
66 11
67 5
68 13
69 11
70 13
71 9
72 19
73 18
74 23
75 11
76 21

List of values

[1, 1, 2, 5, 2, 3, 1, 9, 3, 4, 3, 2, 10, 4, 5, 5, 6, 4, 11, 5, 6, 9, 9, 11, 5, 13, 6, 7, 1, 11, 10, 12, 7, 17, 7, 8, 5, 2, 13, 11, 13, 8, 18, 8, 9, 3, 7, 4, 17, 13, 19, 9, 19, 9, 10, 11, 6, 10, 8, 18, 17, 22, 10, 20, 10, 11, 5, 13, 11, 13, 9, 19, 18, 23, 11, 21]

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