A362582 - cp's OEIS frontend

A362582 Triangular array read by rows. T(n,k) is the number of alternating permutations of [2n+1] having exactly 2k elements to the left of 1, n >= 0, 0 <= k <= n.

n	a(n)
0	1
1	1
2	1
3	5
4	6
5	5
6	61
7	75
8	75
9	61
10	1385
11	1708
12	1750
13	1708
14	1385
15	50521
16	62325
17	64050
18	64050
19	62325
20	50521
21	2702765
22	3334386
23	3427875
24	3438204
25	3427875
26	3334386
27	2702765
28	199360981
29	245951615
30	252857605
31	253708455
32	253708455
33	252857605
34	245951615
35	199360981

[1, 1, 1, 5, 6, 5, 61, 75, 75, 61, 1385, 1708, 1750, 1708, 1385, 50521, 62325, 64050, 64050, 62325, 50521, 2702765, 3334386, 3427875, 3438204, 3427875, 3334386, 2702765, 199360981, 245951615, 252857605, 253708455, 253708455, 252857605, 245951615, 199360981]

cp's OEIS Frontend

A362582 Triangular array read by rows. T(n,k) is the number of alternating permutations of [2n+1] having exactly 2k elements to the left of 1, n >= 0, 0 <= k <= n.

Table of values

List of values