A362745 - cp's OEIS frontend

A362745 Triangular array read by rows. T(n,k) is the number of ordered pairs of n-permutations with exactly k rise/falls or fall/rises, n >= 0, 0 <= k <= max{0,n-1}.

n	a(n)
0	1
1	1
2	2
3	2
4	10
5	16
6	10
7	88
8	200
9	200
10	88
11	1216
12	3536
13	4896
14	3536
15	1216
16	24176
17	85872
18	149152
19	149152
20	85872
21	24176
22	654424
23	2743728
24	5714472
25	7176352
26	5714472
27	2743728
28	654424
29	23136128
30	111842432
31	270769536
32	407103104
33	407103104
34	270769536
35	111842432
36	23136128

[1, 1, 2, 2, 10, 16, 10, 88, 200, 200, 88, 1216, 3536, 4896, 3536, 1216, 24176, 85872, 149152, 149152, 85872, 24176, 654424, 2743728, 5714472, 7176352, 5714472, 2743728, 654424, 23136128, 111842432, 270769536, 407103104, 407103104, 270769536, 111842432, 23136128]

cp's OEIS Frontend

A362745 Triangular array read by rows. T(n,k) is the number of ordered pairs of n-permutations with exactly k rise/falls or fall/rises, n >= 0, 0 <= k <= max{0,n-1}.

Table of values

List of values