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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.

A335487 Number of (1,1)-matching permutations of the prime indices of n.

Table of values

n a(n)
1 0
2 0
3 0
4 1
5 0
6 0
7 0
8 1
9 1
10 0
11 0
12 3
13 0
14 0
15 0
16 1
17 0
18 3
19 0
20 3
21 0
22 0
23 0
24 4
25 1
26 0
27 1
28 3
29 0
30 0
31 0
32 1
33 0
34 0
35 0
36 6
37 0
38 0
39 0
40 4
41 0
42 0
43 0
44 3
45 3
46 0
47 0
48 5
49 1
50 3
51 0
52 3
53 0
54 4
55 0
56 4
57 0
58 0
59 0
60 12
61 0
62 0
63 3
64 1
65 0
66 0
67 0
68 3
69 0
70 0
71 0
72 10
73 0
74 0
75 3
76 3
77 0
78 0
79 0
80 5
81 1
82 0
83 0
84 12
85 0
86 0

List of values

[0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 3, 0, 0, 0, 1, 0, 3, 0, 3, 0, 0, 0, 4, 1, 0, 1, 3, 0, 0, 0, 1, 0, 0, 0, 6, 0, 0, 0, 4, 0, 0, 0, 3, 3, 0, 0, 5, 1, 3, 0, 3, 0, 4, 0, 4, 0, 0, 0, 12, 0, 0, 3, 1, 0, 0, 0, 3, 0, 0, 0, 10, 0, 0, 3, 3, 0, 0, 0, 5, 1, 0, 0, 12, 0, 0]

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

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