A229892 - cp's OEIS frontend

A229892 Number T(n,k) of k up, k down permutations of [n]; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

n	a(n)
0	1
1	1
2	1
3	0
4	1
5	1
6	0
7	2
8	1
9	1
10	0
11	5
12	3
13	1
14	1
15	0
16	16
17	6
18	4
19	1
20	1
21	0
22	61
23	26
24	10
25	5
26	1
27	1
28	0
29	272
30	71
31	20
32	15
33	6
34	1
35	1
36	0
37	1385
38	413
39	125
40	35
41	21
42	7
43	1
44	1
45	0
46	7936
47	1456
48	461
49	70
50	56
51	28
52	8
53	1
54	1
55	0
56	50521
57	10576
58	1301
59	574
60	126
61	84
62	36
63	9
64	1
65	1

[1, 1, 1, 0, 1, 1, 0, 2, 1, 1, 0, 5, 3, 1, 1, 0, 16, 6, 4, 1, 1, 0, 61, 26, 10, 5, 1, 1, 0, 272, 71, 20, 15, 6, 1, 1, 0, 1385, 413, 125, 35, 21, 7, 1, 1, 0, 7936, 1456, 461, 70, 56, 28, 8, 1, 1, 0, 50521, 10576, 1301, 574, 126, 84, 36, 9, 1, 1]

cp's OEIS Frontend

A229892 Number T(n,k) of k up, k down permutations of [n]; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

Table of values

List of values