A189073 - cp's OEIS frontend

A189073 Triangle read by rows: T(n,k) is the number of inversions in k-compositions of n for n >= 3, 2 <= k <= n-1.

n	a(n)
3	1
4	1
5	3
6	2
7	6
8	6
9	2
10	12
11	18
12	10
13	3
14	18
15	42
16	40
17	15
18	3
19	27
20	78
21	110
22	75
23	21
24	4
25	36
26	132
27	240
28	240
29	126
30	28
31	4
32	48
33	204
34	460
35	600
36	462
37	196
38	36
39	5
40	60
41	300
42	800
43	1290
44	1302
45	812
46	288
47	45
48	5
49	75
50	420
51	1300
52	2490
53	3108
54	2548
55	1332
56	405
57	55
58	6
59	90
60	570
61	2000
62	4440
63	6594
64	6692
65	4608
66	2070
67	550
68	66

[1, 1, 3, 2, 6, 6, 2, 12, 18, 10, 3, 18, 42, 40, 15, 3, 27, 78, 110, 75, 21, 4, 36, 132, 240, 240, 126, 28, 4, 48, 204, 460, 600, 462, 196, 36, 5, 60, 300, 800, 1290, 1302, 812, 288, 45, 5, 75, 420, 1300, 2490, 3108, 2548, 1332, 405, 55, 6, 90, 570, 2000, 4440, 6594, 6692, 4608, 2070, 550, 66]

cp's OEIS Frontend

A189073 Triangle read by rows: T(n,k) is the number of inversions in k-compositions of n for n >= 3, 2 <= k <= n-1.

Table of values

List of values