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.

A164652 Triangle read by rows: Hultman numbers: a(n,k) is the number of permutations of n elements whose cycle graph (as defined by Bafna and Pevzner) contains k cycles for n >= 0 and 1 <= k <= n+1.

Table of values

n a(n)
0 1
1 0
2 1
3 1
4 0
5 1
6 0
7 5
8 0
9 1
10 8
11 0
12 15
13 0
14 1
15 0
16 84
17 0
18 35
19 0
20 1
21 180
22 0
23 469
24 0
25 70
26 0
27 1
28 0
29 3044
30 0
31 1869
32 0
33 126
34 0
35 1
36 8064
37 0
38 26060
39 0
40 5985
41 0
42 210
43 0
44 1
45 0
46 193248
47 0
48 152900
49 0
50 16401
51 0
52 330
53 0
54 1
55 604800
56 0
57 2286636
58 0
59 696905
60 0
61 39963
62 0
63 495
64 0
65 1
66 0
67 19056960
68 0
69 18128396
70 0
71 2641925
72 0
73 88803
74 0
75 715
76 0
77 1

List of values

[1, 0, 1, 1, 0, 1, 0, 5, 0, 1, 8, 0, 15, 0, 1, 0, 84, 0, 35, 0, 1, 180, 0, 469, 0, 70, 0, 1, 0, 3044, 0, 1869, 0, 126, 0, 1, 8064, 0, 26060, 0, 5985, 0, 210, 0, 1, 0, 193248, 0, 152900, 0, 16401, 0, 330, 0, 1, 604800, 0, 2286636, 0, 696905, 0, 39963, 0, 495, 0, 1, 0, 19056960, 0, 18128396, 0, 2641925, 0, 88803, 0, 715, 0, 1]