A335872 - cp's OEIS frontend

A335872 Number T(n,k) of permutations of [n] having k points that are fixed or reflected; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

n	a(n)
0	1
1	0
2	1
3	0
4	0
5	2
6	0
7	4
8	0
9	2
10	4
11	0
12	16
13	0
14	4
15	16
16	36
17	32
18	32
19	0
20	4
21	80
22	192
23	216
24	128
25	96
26	0
27	8
28	672
29	1472
30	1440
31	984
32	320
33	144
34	0
35	8
36	4752
37	10752
38	11776
39	7680
40	3936
41	1024
42	384
43	0
44	16
45	48768
46	103568
47	104448
48	65920
49	28544
50	9312
51	1792
52	512
53	0
54	16

[1, 0, 1, 0, 0, 2, 0, 4, 0, 2, 4, 0, 16, 0, 4, 16, 36, 32, 32, 0, 4, 80, 192, 216, 128, 96, 0, 8, 672, 1472, 1440, 984, 320, 144, 0, 8, 4752, 10752, 11776, 7680, 3936, 1024, 384, 0, 16, 48768, 103568, 104448, 65920, 28544, 9312, 1792, 512, 0, 16]

cp's OEIS Frontend

A335872 Number T(n,k) of permutations of [n] having k points that are fixed or reflected; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

Table of values

List of values