A306543 - cp's OEIS frontend

A306543 Number T(n,k) of permutations p of [n] such that |p(j)-j| >= k (for all j in [n]); triangle T(n,k), n >= 0, 0 <= k <= floor(n/2), read by rows.

n	a(n)
0	1
1	1
2	2
3	1
4	6
5	2
6	24
7	9
8	1
9	120
10	44
11	4
12	720
13	265
14	29
15	1
16	5040
17	1854
18	206
19	8
20	40320
21	14833
22	1708
23	112
24	1
25	362880
26	133496
27	15702
28	1168
29	16
30	3628800
31	1334961
32	159737
33	13365
34	436
35	1
36	39916800
37	14684570
38	1780696
39	159414
40	6984
41	32
42	479001600
43	176214841
44	21599745
45	2036488
46	114124
47	1708
48	1

[1, 1, 2, 1, 6, 2, 24, 9, 1, 120, 44, 4, 720, 265, 29, 1, 5040, 1854, 206, 8, 40320, 14833, 1708, 112, 1, 362880, 133496, 15702, 1168, 16, 3628800, 1334961, 159737, 13365, 436, 1, 39916800, 14684570, 1780696, 159414, 6984, 32, 479001600, 176214841, 21599745, 2036488, 114124, 1708, 1]

cp's OEIS Frontend

A306543 Number T(n,k) of permutations p of [n] such that |p(j)-j| >= k (for all j in [n]); triangle T(n,k), n >= 0, 0 <= k <= floor(n/2), read by rows.

Table of values

List of values