A185209 - cp's OEIS frontend

A185209 Triangle read by rows: T(n,k) is the number of indecomposable (connected) permutations of {1,2,...,n} having genus k (see first comment for definition of genus).

n	a(n)
1	1
2	1
3	0
4	2
5	1
6	0
7	5
8	8
9	0
10	0
11	14
12	49
13	8
14	0
15	0
16	42
17	268
18	151
19	0
20	0
21	0
22	132
23	1375
24	1760
25	180
26	0
27	0
28	0
29	429
30	6768
31	16184
32	5712
33	0
34	0
35	0
36	0
37	1430
38	32354
39	128578
40	102917
41	8064
42	0
43	0
44	0
45	0
46	4862
47	151336
48	923799
49	1379384
50	369944
51	0
52	0
53	0
54	0
55	0
56	16796
57	696027
58	6164460
59	15283308
60	9233512
61	604800
62	0

[1, 1, 0, 2, 1, 0, 5, 8, 0, 0, 14, 49, 8, 0, 0, 42, 268, 151, 0, 0, 0, 132, 1375, 1760, 180, 0, 0, 0, 429, 6768, 16184, 5712, 0, 0, 0, 0, 1430, 32354, 128578, 102917, 8064, 0, 0, 0, 0, 4862, 151336, 923799, 1379384, 369944, 0, 0, 0, 0, 0, 16796, 696027, 6164460, 15283308, 9233512, 604800, 0]

cp's OEIS Frontend

A185209 Triangle read by rows: T(n,k) is the number of indecomposable (connected) permutations of {1,2,...,n} having genus k (see first comment for definition of genus).

Table of values

List of values