A241475 - cp's OEIS frontend

A241475 Triangle t(n,r) = s(n,r)*s(n,r+1), where s(n,r) = lcm(n,n-1,...,n-r+1)/lcm(1,2,...,r-1,r), n >= 1 and 0 <= r < n.

n	a(n)
1	1
2	2
3	2
4	3
5	9
6	3
7	4
8	24
9	12
10	2
11	5
12	50
13	100
14	50
15	5
16	6
17	90
18	150
19	50
20	5
21	1
22	7
23	147
24	735
25	1225
26	245
27	49
28	7
29	8
30	224
31	784
32	1960
33	980
34	196
35	28
36	2
37	9
38	324
39	3024
40	3528
41	1764
42	1764
43	252
44	18
45	3
46	10
47	450
48	2700
49	12600
50	8820
51	1764
52	252
53	18
54	3
55	1
56	11
57	605
58	9075
59	54450
60	152460
61	213444
62	30492
63	2178
64	363
65	121
66	11

[1, 2, 2, 3, 9, 3, 4, 24, 12, 2, 5, 50, 100, 50, 5, 6, 90, 150, 50, 5, 1, 7, 147, 735, 1225, 245, 49, 7, 8, 224, 784, 1960, 980, 196, 28, 2, 9, 324, 3024, 3528, 1764, 1764, 252, 18, 3, 10, 450, 2700, 12600, 8820, 1764, 252, 18, 3, 1, 11, 605, 9075, 54450, 152460, 213444, 30492, 2178, 363, 121, 11]

cp's OEIS Frontend

A241475 Triangle t(n,r) = s(n,r)*s(n,r+1), where s(n,r) = lcm(n,n-1,...,n-r+1)/lcm(1,2,...,r-1,r), n >= 1 and 0 <= r < n.

Table of values

List of values