A325754 - cp's OEIS frontend

A325754 Triangle read by rows giving the number of configurations of n indistinguishable pairs placed on the vertices of the ladder graph P_2 X P_n such that exactly k such pairs are joined by a horizontal edge.

n	a(n)
0	1
1	1
2	0
3	2
4	0
5	1
6	7
7	4
8	4
9	0
10	43
11	38
12	21
13	2
14	1
15	372
16	360
17	168
18	36
19	9
20	0
21	4027
22	3972
23	1818
24	478
25	93
26	6
27	1
28	51871
29	51444
30	23760
31	6640
32	1260
33	144
34	16
35	0
36	773186
37	768732
38	358723
39	103154
40	20205
41	2734
42	278
43	12
44	1
45	13083385
46	13027060
47	6129670
48	1796740
49	363595
50	52900
51	5650
52	400
53	25
54	0

[1, 1, 0, 2, 0, 1, 7, 4, 4, 0, 43, 38, 21, 2, 1, 372, 360, 168, 36, 9, 0, 4027, 3972, 1818, 478, 93, 6, 1, 51871, 51444, 23760, 6640, 1260, 144, 16, 0, 773186, 768732, 358723, 103154, 20205, 2734, 278, 12, 1, 13083385, 13027060, 6129670, 1796740, 363595, 52900, 5650, 400, 25, 0]

cp's OEIS Frontend

A325754 Triangle read by rows giving the number of configurations of n indistinguishable pairs placed on the vertices of the ladder graph P_2 X P_n such that exactly k such pairs are joined by a horizontal edge.

Table of values

List of values