A178514 - cp's OEIS frontend

A178514 Triangle read by rows: T(n,k) is the number of derangements of {1,2,...,n} having genus k (see first comment for definition of genus).

n	a(n)
1	0
2	1
3	0
4	1
5	1
6	0
7	3
8	6
9	0
10	0
11	6
12	30
13	8
14	0
15	0
16	15
17	130
18	120
19	0
20	0
21	0
22	36
23	525
24	1113
25	180
26	0
27	0
28	0
29	91
30	2016
31	8078
32	4648
33	0
34	0
35	0
36	0
37	232
38	7476
39	50316
40	67408
41	8064
42	0
43	0
44	0
45	0
46	603
47	27000
48	281862
49	719640
50	305856
51	0
52	0
53	0
54	0
55	0
56	1585
57	95535
58	1459920
59	6298930
60	6223800
61	604800
62	0

[0, 1, 0, 1, 1, 0, 3, 6, 0, 0, 6, 30, 8, 0, 0, 15, 130, 120, 0, 0, 0, 36, 525, 1113, 180, 0, 0, 0, 91, 2016, 8078, 4648, 0, 0, 0, 0, 232, 7476, 50316, 67408, 8064, 0, 0, 0, 0, 603, 27000, 281862, 719640, 305856, 0, 0, 0, 0, 0, 1585, 95535, 1459920, 6298930, 6223800, 604800, 0]

cp's OEIS Frontend

A178514 Triangle read by rows: T(n,k) is the number of derangements of {1,2,...,n} having genus k (see first comment for definition of genus).

Table of values

List of values