A364817 - cp's OEIS frontend

A364817 Triangle read by rows: T(n,k) = number of permutations p of [n] such that max(|p(p(i)) - i|)=k (n>=1, 0<=k<=n-1).

n	a(n)
1	1
2	2
3	0
4	4
5	0
6	2
7	10
8	2
9	6
10	6
11	26
12	6
13	22
14	36
15	30
16	76
17	24
18	92
19	144
20	216
21	168
22	232
23	80
24	334
25	640
26	1150
27	1524
28	1080
29	764
30	312
31	1328
32	2984
33	5516
34	9712
35	11784
36	7920
37	2620
38	1152
39	5234
40	13296
41	27668
42	55750
43	90240
44	101400
45	65520
46	9496
47	4616
48	21780
49	62124
50	144564
51	306272
52	601756
53	909312
54	964080
55	604800

[1, 2, 0, 4, 0, 2, 10, 2, 6, 6, 26, 6, 22, 36, 30, 76, 24, 92, 144, 216, 168, 232, 80, 334, 640, 1150, 1524, 1080, 764, 312, 1328, 2984, 5516, 9712, 11784, 7920, 2620, 1152, 5234, 13296, 27668, 55750, 90240, 101400, 65520, 9496, 4616, 21780, 62124, 144564, 306272, 601756, 909312, 964080, 604800]

cp's OEIS Frontend

A364817 Triangle read by rows: T(n,k) = number of permutations p of [n] such that max(|p(p(i)) - i|)=k (n>=1, 0<=k<=n-1).

Table of values

List of values