A008290 - cp's OEIS frontend

A008290 Triangle T(n,k) of rencontres numbers (number of permutations of n elements with k fixed points).

n	a(n)
0	1
1	0
2	1
3	1
4	0
5	1
6	2
7	3
8	0
9	1
10	9
11	8
12	6
13	0
14	1
15	44
16	45
17	20
18	10
19	0
20	1
21	265
22	264
23	135
24	40
25	15
26	0
27	1
28	1854
29	1855
30	924
31	315
32	70
33	21
34	0
35	1
36	14833
37	14832
38	7420
39	2464
40	630
41	112
42	28
43	0
44	1
45	133496
46	133497
47	66744
48	22260
49	5544
50	1134
51	168
52	36
53	0
54	1
55	1334961
56	1334960
57	667485
58	222480
59	55650
60	11088
61	1890
62	240
63	45
64	0
65	1

[1, 0, 1, 1, 0, 1, 2, 3, 0, 1, 9, 8, 6, 0, 1, 44, 45, 20, 10, 0, 1, 265, 264, 135, 40, 15, 0, 1, 1854, 1855, 924, 315, 70, 21, 0, 1, 14833, 14832, 7420, 2464, 630, 112, 28, 0, 1, 133496, 133497, 66744, 22260, 5544, 1134, 168, 36, 0, 1, 1334961, 1334960, 667485, 222480, 55650, 11088, 1890, 240, 45, 0, 1]

cp's OEIS Frontend

A008290 Triangle T(n,k) of rencontres numbers (number of permutations of n elements with k fixed points).

Table of values

List of values