A134435 - cp's OEIS frontend

A134435 Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k odd entries that are followed by a smaller entry (n >= 0, k >= 0).

n	a(n)
0	1
1	1
2	2
3	2
4	4
5	12
6	12
7	12
8	72
9	36
10	144
11	432
12	144
13	144
14	1728
15	2592
16	576
17	2880
18	17280
19	17280
20	2880
21	2880
22	57600
23	172800
24	115200
25	14400
26	86400
27	864000
28	1728000
29	864000
30	86400
31	86400
32	2592000
33	12960000
34	17280000
35	6480000
36	518400

[1, 1, 2, 2, 4, 12, 12, 12, 72, 36, 144, 432, 144, 144, 1728, 2592, 576, 2880, 17280, 17280, 2880, 2880, 57600, 172800, 115200, 14400, 86400, 864000, 1728000, 864000, 86400, 86400, 2592000, 12960000, 17280000, 6480000, 518400]

cp's OEIS Frontend

A134435 Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k odd entries that are followed by a smaller entry (n >= 0, k >= 0).

Table of values

List of values