A249631 - cp's OEIS frontend

A249631 Number of permutations p of {1,...,n} such that |p(i+1)-p(i)| < k, k=2,...,n; T(n,k), read by rows.

n	a(n)
2	2
3	2
4	6
5	2
6	12
7	24
8	2
9	20
10	72
11	120
12	2
13	34
14	180
15	480
16	720
17	2
18	56
19	428
20	1632
21	3600
22	5040
23	2
24	88
25	1042
26	5124
27	15600
28	30240
29	40320
30	2
31	136
32	2512
33	15860
34	61872
35	159840
36	282240
37	362880
38	2
39	208
40	5912
41	50186
42	236388
43	773040
44	1764000
45	2903040
46	3628800

[2, 2, 6, 2, 12, 24, 2, 20, 72, 120, 2, 34, 180, 480, 720, 2, 56, 428, 1632, 3600, 5040, 2, 88, 1042, 5124, 15600, 30240, 40320, 2, 136, 2512, 15860, 61872, 159840, 282240, 362880, 2, 208, 5912, 50186, 236388, 773040, 1764000, 2903040, 3628800]

cp's OEIS Frontend

A249631 Number of permutations p of {1,...,n} such that |p(i+1)-p(i)| < k, k=2,...,n; T(n,k), read by rows.

Table of values

List of values