A381529 - cp's OEIS frontend

A381529 T(n,k) is the number of permutations of [n] having exactly k pairs of integers i in [n] such that their cycle minima have opposite sorting order; triangle T(n,k), n>=0, 0<=k<=A125811(n)-1, read by rows.

n	a(n)
0	1
1	1
2	2
3	5
4	1
5	15
6	5
7	4
8	54
9	21
10	24
11	16
12	5
13	235
14	89
15	118
16	112
17	101
18	35
19	28
20	2
21	1237
22	408
23	577
24	633
25	719
26	585
27	402
28	239
29	167
30	59
31	14
32	7790
33	2106
34	3023
35	3529
36	4410
37	4463
38	4600
39	3012
40	2789
41	1933
42	1438
43	629
44	442
45	122
46	34
47	57581
48	12529
49	17693
50	20980
51	27208
52	30064
53	35359
54	33332
55	28137
56	24970
57	22850
58	17148
59	14272
60	8645
61	5639
62	3684
63	1809
64	664
65	282
66	34

[1, 1, 2, 5, 1, 15, 5, 4, 54, 21, 24, 16, 5, 235, 89, 118, 112, 101, 35, 28, 2, 1237, 408, 577, 633, 719, 585, 402, 239, 167, 59, 14, 7790, 2106, 3023, 3529, 4410, 4463, 4600, 3012, 2789, 1933, 1438, 629, 442, 122, 34, 57581, 12529, 17693, 20980, 27208, 30064, 35359, 33332, 28137, 24970, 22850, 17148, 14272, 8645, 5639, 3684, 1809, 664, 282, 34]

cp's OEIS Frontend

A381529 T(n,k) is the number of permutations of [n] having exactly k pairs of integers i in [n] such that their cycle minima have opposite sorting order; triangle T(n,k), n>=0, 0<=k<=A125811(n)-1, read by rows.

Table of values

List of values