A064484 - cp's OEIS frontend

A064484 Triangle T(n,k), n >= 2, n+1 <= k <= 2*n-1, number of permutations p of 1,...,n, with max(p(i)+p(i-1), i=2..n) = k.

n	a(n)
2	2
3	2
4	4
5	4
6	8
7	12
8	4
9	32
10	36
11	48
12	8
13	64
14	216
15	192
16	240
17	8
18	208
19	648
20	1536
21	1200
22	1440
23	16
24	416
25	3024
26	6144
27	12000
28	8640
29	10080
30	16
31	1280
32	9072
33	37632
34	60000
35	103680
36	70560
37	80640
38	32
39	2560
40	38880
41	150528
42	456000
43	622080
44	987840
45	645120
46	725760

[2, 2, 4, 4, 8, 12, 4, 32, 36, 48, 8, 64, 216, 192, 240, 8, 208, 648, 1536, 1200, 1440, 16, 416, 3024, 6144, 12000, 8640, 10080, 16, 1280, 9072, 37632, 60000, 103680, 70560, 80640, 32, 2560, 38880, 150528, 456000, 622080, 987840, 645120, 725760]

cp's OEIS Frontend

A064484 Triangle T(n,k), n >= 2, n+1 <= k <= 2*n-1, number of permutations p of 1,...,n, with max(p(i)+p(i-1), i=2..n) = k.

Table of values

List of values