A105868 - cp's OEIS frontend

A105868 Triangle read by rows, T(n,k) = C(n,k)*C(k,n-k).

n	a(n)
0	1
1	0
2	1
3	0
4	2
5	1
6	0
7	0
8	6
9	1
10	0
11	0
12	6
13	12
14	1
15	0
16	0
17	0
18	30
19	20
20	1
21	0
22	0
23	0
24	20
25	90
26	30
27	1
28	0
29	0
30	0
31	0
32	140
33	210
34	42
35	1
36	0
37	0
38	0
39	0
40	70
41	560
42	420
43	56
44	1
45	0
46	0
47	0
48	0
49	0
50	630
51	1680
52	756
53	72
54	1
55	0
56	0
57	0
58	0
59	0
60	252
61	3150
62	4200
63	1260
64	90
65	1
66	0
67	0
68	0
69	0
70	0
71	0
72	2772
73	11550
74	9240
75	1980
76	110
77	1
78	0
79	0

[1, 0, 1, 0, 2, 1, 0, 0, 6, 1, 0, 0, 6, 12, 1, 0, 0, 0, 30, 20, 1, 0, 0, 0, 20, 90, 30, 1, 0, 0, 0, 0, 140, 210, 42, 1, 0, 0, 0, 0, 70, 560, 420, 56, 1, 0, 0, 0, 0, 0, 630, 1680, 756, 72, 1, 0, 0, 0, 0, 0, 252, 3150, 4200, 1260, 90, 1, 0, 0, 0, 0, 0, 0, 2772, 11550, 9240, 1980, 110, 1, 0, 0]

cp's OEIS Frontend

A105868 Triangle read by rows, T(n,k) = C(n,k)*C(k,n-k).

Table of values

List of values