A249831 - cp's OEIS frontend

A249831 A(n,n) = 1, A(n,k) = A(n,k+1)k / gcd(A(n,k+1),k)^2 if n>k, A(n,k) = A(n,k-1)k / gcd(A(n,k-1),k)^2 if n square array A(n,k), n>=1, k>=1, read by antidiagonals.

n	a(n)
1	1
2	2
3	1
4	6
5	1
6	2
7	6
8	3
9	2
10	6
11	30
12	12
13	1
14	6
15	6
16	5
17	60
18	4
19	3
20	6
21	30
22	35
23	10
24	20
25	1
26	12
27	30
28	5
29	280
30	70
31	30
32	5
33	4
34	60
35	5
36	35
37	2520
38	140
39	210
40	30
41	1
42	20
43	10
44	35
45	70
46	252
47	1260
48	420
49	210
50	6
51	5
52	30
53	70
54	70
55	70
56	2772
57	126
58	420
59	420
60	42
61	1
62	30
63	210
64	35
65	70
66	7

[1, 2, 1, 6, 1, 2, 6, 3, 2, 6, 30, 12, 1, 6, 6, 5, 60, 4, 3, 6, 30, 35, 10, 20, 1, 12, 30, 5, 280, 70, 30, 5, 4, 60, 5, 35, 2520, 140, 210, 30, 1, 20, 10, 35, 70, 252, 1260, 420, 210, 6, 5, 30, 70, 70, 70, 2772, 126, 420, 420, 42, 1, 30, 210, 35, 70, 7]

cp's OEIS Frontend

A249831 A(n,n) = 1, A(n,k) = A(n,k+1)k / gcd(A(n,k+1),k)^2 if n>k, A(n,k) = A(n,k-1)k / gcd(A(n,k-1),k)^2 if n square array A(n,k), n>=1, k>=1, read by antidiagonals.

Table of values

List of values

cp's OEIS Frontend

A249831 A(n,n) = 1, A(n,k) = A(n,k+1)*k / gcd(A(n,k+1),k)^2 if n>k, A(n,k) = A(n,k-1)*k / gcd(A(n,k-1),k)^2 if n square array A(n,k), n>=1, k>=1, read by antidiagonals.

Table of values

List of values

A249831 A(n,n) = 1, A(n,k) = A(n,k+1)k / gcd(A(n,k+1),k)^2 if n>k, A(n,k) = A(n,k-1)k / gcd(A(n,k-1),k)^2 if n square array A(n,k), n>=1, k>=1, read by antidiagonals.