A144088 - cp's OEIS frontend

A144088 T(n,k) is the number of partial bijections (or subpermutations) of an n-element set with exactly k fixed points.

n	a(n)
0	1
1	1
2	1
3	4
4	2
5	1
6	18
7	12
8	3
9	1
10	108
11	72
12	24
13	4
14	1
15	780
16	540
17	180
18	40
19	5
20	1
21	6600
22	4680
23	1620
24	360
25	60
26	6
27	1
28	63840
29	46200
30	16380
31	3780
32	630
33	84
34	7
35	1
36	693840
37	510720
38	184800
39	43680
40	7560
41	1008
42	112
43	8
44	1
45	8361360
46	6244560
47	2298240
48	554400
49	98280
50	13608
51	1512
52	144
53	9
54	1

[1, 1, 1, 4, 2, 1, 18, 12, 3, 1, 108, 72, 24, 4, 1, 780, 540, 180, 40, 5, 1, 6600, 4680, 1620, 360, 60, 6, 1, 63840, 46200, 16380, 3780, 630, 84, 7, 1, 693840, 510720, 184800, 43680, 7560, 1008, 112, 8, 1, 8361360, 6244560, 2298240, 554400, 98280, 13608, 1512, 144, 9, 1]

cp's OEIS Frontend

A144088 T(n,k) is the number of partial bijections (or subpermutations) of an n-element set with exactly k fixed points.

Table of values

List of values