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.

A261430 Number A(n,k) of permutations p of [n] without fixed points such that p^k = Id; square array A(n,k), n>=0, k>=0, read by antidiagonals.

Table of values

n a(n)
0 1
1 1
2 0
3 1
4 0
5 0
6 1
7 0
8 0
9 0
10 1
11 0
12 1
13 0
14 0
15 1
16 0
17 0
18 0
19 0
20 0
21 1
22 0
23 1
24 2
25 3
26 0
27 0
28 1
29 0
30 0
31 0
32 0
33 0
34 0
35 0
36 1
37 0
38 1
39 0
40 9
41 0
42 15
43 0
44 0
45 1
46 0
47 0
48 2
49 0
50 0
51 40
52 0
53 0
54 0
55 1
56 0
57 1
58 0
59 3
60 24
61 105
62 0
63 105
64 0
65 0
66 1
67 0
68 0
69 0
70 0
71 20
72 0
73 0
74 0
75 0
76 0
77 0
78 1
79 0
80 1
81 2
82 9
83 0
84 175
85 0
86 2625
87 2240
88 945
89 0
90 0

List of values

[1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 2, 3, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 9, 0, 15, 0, 0, 1, 0, 0, 2, 0, 0, 40, 0, 0, 0, 1, 0, 1, 0, 3, 24, 105, 0, 105, 0, 0, 1, 0, 0, 0, 0, 20, 0, 0, 0, 0, 0, 0, 1, 0, 1, 2, 9, 0, 175, 0, 2625, 2240, 945, 0, 0]