A152662 - cp's OEIS frontend

A152662 Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} for which k is the maximal number of initial odd entries (0 <= k <= ceiling(n/2)).

n	a(n)
0	1
1	0
2	1
3	1
4	1
5	2
6	2
7	2
8	12
9	8
10	4
11	48
12	36
13	24
14	12
15	360
16	216
17	108
18	36
19	2160
20	1440
21	864
22	432
23	144
24	20160
25	11520
26	5760
27	2304
28	576
29	161280
30	100800
31	57600
32	28800
33	11520
34	2880
35	1814400
36	1008000
37	504000
38	216000
39	72000
40	14400
41	18144000
42	10886400
43	6048000
44	3024000

[1, 0, 1, 1, 1, 2, 2, 2, 12, 8, 4, 48, 36, 24, 12, 360, 216, 108, 36, 2160, 1440, 864, 432, 144, 20160, 11520, 5760, 2304, 576, 161280, 100800, 57600, 28800, 11520, 2880, 1814400, 1008000, 504000, 216000, 72000, 14400, 18144000, 10886400, 6048000, 3024000]

cp's OEIS Frontend

A152662 Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} for which k is the maximal number of initial odd entries (0 <= k <= ceiling(n/2)).

Table of values

List of values