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.

A360288 Number T(n,k) of permutations of [n] whose excedance set is the k-th finite subset of positive integers in standard order; triangle T(n,k), n>=0, 0<=k<=ceiling(2^(n-1))-1, read by rows.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 3
6 1
7 1
8 1
9 7
10 3
11 7
12 1
13 3
14 1
15 1
16 1
17 15
18 7
19 31
20 3
21 17
22 7
23 15
24 1
25 7
26 3
27 7
28 1
29 3
30 1
31 1
32 1
33 31
34 15
35 115
36 7
37 69
38 31
39 115
40 3
41 37
42 17
43 69
44 7
45 37
46 15
47 31
48 1
49 15
50 7
51 31
52 3
53 17
54 7
55 15
56 1
57 7
58 3
59 7
60 1
61 3
62 1
63 1
64 1
65 63
66 31
67 391
68 15
69 245
70 115
71 675
72 7
73 145
74 69

List of values

[1, 1, 1, 1, 1, 3, 1, 1, 1, 7, 3, 7, 1, 3, 1, 1, 1, 15, 7, 31, 3, 17, 7, 15, 1, 7, 3, 7, 1, 3, 1, 1, 1, 31, 15, 115, 7, 69, 31, 115, 3, 37, 17, 69, 7, 37, 15, 31, 1, 15, 7, 31, 3, 17, 7, 15, 1, 7, 3, 7, 1, 3, 1, 1, 1, 63, 31, 391, 15, 245, 115, 675, 7, 145, 69]