A174708 - cp's OEIS frontend

A174708 The number of permutations p of {1,...,n} satisfying |p(i)-p(i+1)| is in {4,5} for i from 1 to n-1.

n	a(n)
1	1
2	0
3	0
4	0
5	0
6	0
7	0
8	2
9	18
10	12
11	0
12	0
13	0
14	0
15	0
16	0
17	30
18	136
19	112
20	0
21	0
22	0
23	0
24	0
25	0
26	400
27	1348
28	1352
29	408
30	180
31	120
32	180
33	408
34	1352
35	7356
36	19008
37	23028
38	16788
39	12630
40	11744
41	16742
42	31320
43	70256
44	181106
45	367560
46	503800
47	533504
48	546468
49	623546
50	881384
51	1468398
52	2697374
53	5164896
54	8976002
55	12977384

[1, 0, 0, 0, 0, 0, 0, 2, 18, 12, 0, 0, 0, 0, 0, 0, 30, 136, 112, 0, 0, 0, 0, 0, 0, 400, 1348, 1352, 408, 180, 120, 180, 408, 1352, 7356, 19008, 23028, 16788, 12630, 11744, 16742, 31320, 70256, 181106, 367560, 503800, 533504, 546468, 623546, 881384, 1468398, 2697374, 5164896, 8976002, 12977384]

cp's OEIS Frontend

A174708 The number of permutations p of {1,...,n} satisfying |p(i)-p(i+1)| is in {4,5} for i from 1 to n-1.

Table of values

List of values