A079267 - cp's OEIS frontend

A079267 d(n,s) = number of perfect matchings on {1, 2, ..., n} with s short pairs.

n	a(n)
0	1
1	0
2	1
3	1
4	1
5	1
6	5
7	6
8	3
9	1
10	36
11	41
12	21
13	6
14	1
15	329
16	365
17	185
18	55
19	10
20	1
21	3655
22	3984
23	2010
24	610
25	120
26	15
27	1
28	47844
29	51499
30	25914
31	7980
32	1645
33	231
34	21
35	1
36	721315
37	769159
38	386407
39	120274
40	25585
41	3850
42	406
43	28
44	1
45	12310199
46	13031514
47	6539679
48	2052309
49	446544
50	70371
51	8106
52	666
53	36
54	1

[1, 0, 1, 1, 1, 1, 5, 6, 3, 1, 36, 41, 21, 6, 1, 329, 365, 185, 55, 10, 1, 3655, 3984, 2010, 610, 120, 15, 1, 47844, 51499, 25914, 7980, 1645, 231, 21, 1, 721315, 769159, 386407, 120274, 25585, 3850, 406, 28, 1, 12310199, 13031514, 6539679, 2052309, 446544, 70371, 8106, 666, 36, 1]

cp's OEIS Frontend

A079267 d(n,s) = number of perfect matchings on {1, 2, ..., n} with s short pairs.

Table of values

List of values