A306461 - cp's OEIS frontend

A306461 Number T(n,k) of occurrences of k in a (signed) displacement set of a permutation of [n]; triangle T(n,k), n>=1, 1-n<=k<=n-1, read by rows.

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	3
7	4
8	3
9	2
10	6
11	10
12	13
13	15
14	13
15	10
16	6
17	24
18	42
19	56
20	67
21	76
22	67
23	56
24	42
25	24
26	120
27	216
28	294
29	358
30	411
31	455
32	411
33	358
34	294
35	216
36	120
37	720
38	1320
39	1824
40	2250
41	2612
42	2921
43	3186
44	2921
45	2612
46	2250
47	1824
48	1320
49	720
50	5040
51	9360
52	13080
53	16296
54	19086
55	21514
56	23633
57	25487
58	23633
59	21514
60	19086
61	16296
62	13080
63	9360
64	5040

[1, 1, 1, 1, 2, 3, 4, 3, 2, 6, 10, 13, 15, 13, 10, 6, 24, 42, 56, 67, 76, 67, 56, 42, 24, 120, 216, 294, 358, 411, 455, 411, 358, 294, 216, 120, 720, 1320, 1824, 2250, 2612, 2921, 3186, 2921, 2612, 2250, 1824, 1320, 720, 5040, 9360, 13080, 16296, 19086, 21514, 23633, 25487, 23633, 21514, 19086, 16296, 13080, 9360, 5040]

cp's OEIS Frontend

A306461 Number T(n,k) of occurrences of k in a (signed) displacement set of a permutation of [n]; triangle T(n,k), n>=1, 1-n<=k<=n-1, read by rows.

Table of values

List of values