A326411 - cp's OEIS frontend

A326411 Triangle T(n,k) read by rows: T(n,k) = the number of ways of seating n people around a table for the second time so that k pairs are maintained. Reflected and rotated sequences are counted as one.

n	a(n)
0	1
1	0
2	1
3	0
4	0
5	1
6	0
7	0
8	0
9	1
10	0
11	0
12	2
13	0
14	1
15	1
16	0
17	5
18	5
19	0
20	1
21	3
22	12
23	15
24	20
25	9
26	0
27	1
28	23
29	70
30	112
31	91
32	49
33	14
34	0
35	1
36	177
37	544
38	740
39	640
40	302
41	96
42	20
43	0
44	1
45	1553
46	4500
47	6003
48	4725
49	2439
50	747
51	165
52	27
53	0
54	1
55	14963
56	41740
57	53585
58	41420
59	20810
60	7076
61	1550
62	260
63	35
64	0
65	1

[1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 2, 0, 1, 1, 0, 5, 5, 0, 1, 3, 12, 15, 20, 9, 0, 1, 23, 70, 112, 91, 49, 14, 0, 1, 177, 544, 740, 640, 302, 96, 20, 0, 1, 1553, 4500, 6003, 4725, 2439, 747, 165, 27, 0, 1, 14963, 41740, 53585, 41420, 20810, 7076, 1550, 260, 35, 0, 1]

cp's OEIS Frontend

A326411 Triangle T(n,k) read by rows: T(n,k) = the number of ways of seating n people around a table for the second time so that k pairs are maintained. Reflected and rotated sequences are counted as one.

Table of values

List of values