A178518 - cp's OEIS frontend

A178518 Triangle read by rows: T(n,k) is the number of permutations p of {1,2,...,n} having genus 0 and such that p(1)=k (see first comment for definition of genus).

n	a(n)
1	1
2	1
3	1
4	2
5	2
6	1
7	5
8	5
9	2
10	2
11	14
12	14
13	5
14	4
15	5
16	42
17	42
18	14
19	10
20	10
21	14
22	132
23	132
24	42
25	28
26	25
27	28
28	42
29	429
30	429
31	132
32	84
33	70
34	70
35	84
36	132
37	1430
38	1430
39	429
40	264
41	210
42	196
43	210
44	264
45	429
46	4862
47	4862
48	1430
49	858
50	660
51	588
52	588
53	660
54	858
55	1430
56	16796
57	16796
58	4862
59	2860
60	2145
61	1848
62	1764
63	1848
64	2145
65	2860
66	4862

[1, 1, 1, 2, 2, 1, 5, 5, 2, 2, 14, 14, 5, 4, 5, 42, 42, 14, 10, 10, 14, 132, 132, 42, 28, 25, 28, 42, 429, 429, 132, 84, 70, 70, 84, 132, 1430, 1430, 429, 264, 210, 196, 210, 264, 429, 4862, 4862, 1430, 858, 660, 588, 588, 660, 858, 1430, 16796, 16796, 4862, 2860, 2145, 1848, 1764, 1848, 2145, 2860, 4862]

cp's OEIS Frontend

A178518 Triangle read by rows: T(n,k) is the number of permutations p of {1,2,...,n} having genus 0 and such that p(1)=k (see first comment for definition of genus).

Table of values

List of values