A361651 - cp's OEIS frontend

A361651 Number T(n,k) of permutations p of [n] such that p(i), p(i+k), p(i+2k),... form an up-down sequence for i in [k]; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

n	a(n)
0	1
1	0
2	1
3	0
4	1
5	2
6	0
7	2
8	3
9	6
10	0
11	5
12	6
13	12
14	24
15	0
16	16
17	20
18	30
19	60
20	120
21	0
22	61
23	80
24	90
25	180
26	360
27	720
28	0
29	272
30	350
31	420
32	630
33	1260
34	2520
35	5040
36	0
37	1385
38	1750
39	2240
40	2520
41	5040
42	10080
43	20160
44	40320
45	0
46	7936
47	10080
48	13440
49	15120
50	22680
51	45360
52	90720
53	181440
54	362880

[1, 0, 1, 0, 1, 2, 0, 2, 3, 6, 0, 5, 6, 12, 24, 0, 16, 20, 30, 60, 120, 0, 61, 80, 90, 180, 360, 720, 0, 272, 350, 420, 630, 1260, 2520, 5040, 0, 1385, 1750, 2240, 2520, 5040, 10080, 20160, 40320, 0, 7936, 10080, 13440, 15120, 22680, 45360, 90720, 181440, 362880]

cp's OEIS Frontend

A361651 Number T(n,k) of permutations p of [n] such that p(i), p(i+k), p(i+2k),... form an up-down sequence for i in [k]; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

Table of values

List of values