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.

A356261 Partition triangle read by rows, counting irreducible permutations with weakly decreasing Lehmer code, refining triangle A119308.

Table of values

n a(n)
0 1
1 1
2 0
3 1
4 0
5 2
6 1
7 0
8 2
9 1
10 5
11 1
12 0
13 2
14 2
15 7
16 7
17 9
18 1
19 0
20 2
21 2
22 1
23 9
24 18
25 3
26 16
27 24
28 14
29 1
30 0
31 2
32 2
33 2
34 11
35 22
36 11
37 11
38 25
39 75
40 25
41 30
42 60
43 20
44 1
45 0
46 2
47 2
48 2
49 1
50 13
51 26
52 26
53 13
54 13
55 36
56 108
57 54
58 108
59 9
60 55
61 220
62 110
63 50
64 125
65 27
66 1

List of values

[1, 1, 0, 1, 0, 2, 1, 0, 2, 1, 5, 1, 0, 2, 2, 7, 7, 9, 1, 0, 2, 2, 1, 9, 18, 3, 16, 24, 14, 1, 0, 2, 2, 2, 11, 22, 11, 11, 25, 75, 25, 30, 60, 20, 1, 0, 2, 2, 2, 1, 13, 26, 26, 13, 13, 36, 108, 54, 108, 9, 55, 220, 110, 50, 125, 27, 1]

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

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