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.

A079440 Number of transpositions (2-cycles) in range [A014137(n-1)..A014138(n-1)] of permutation A057505 (= Donaghey's automorphism M).

Table of values

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

List of values

[0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 6, 6, 6, 7, 8, 8, 9, 9, 11, 12, 12, 12, 14, 14, 14, 15, 17, 17, 18, 18, 19, 20, 20, 20, 23, 23, 23, 24, 25, 25, 26, 26, 28, 29, 29, 29, 31, 31, 31, 32, 34, 34, 35, 35, 36, 37, 37, 37, 40, 40, 40, 41, 42, 42, 43, 43, 45, 46, 46, 46, 48, 48, 48]

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