A334724 - cp's OEIS frontend

A334724 Denominator of the sum of all elements of the n X n matrix M with M[i,j] = (-1)^(i+j)*i/j for i,j = 1..n.

n	a(n)
1	1
2	2
3	3
4	6
5	20
6	20
7	105
8	210
9	504
10	504
11	4620
12	4620
13	51480
14	51480
15	9009
16	18018
17	272272
18	272272
19	23279256
20	23279256
21	21162960
22	21162960
23	446185740
24	446185740
25	2059318800
26	2059318800
27	5736673800
28	5736673800
29	22181805360
30	22181805360
31	644658718275
32	1289317436550
33	1213475234400

[1, 2, 3, 6, 20, 20, 105, 210, 504, 504, 4620, 4620, 51480, 51480, 9009, 18018, 272272, 272272, 23279256, 23279256, 21162960, 21162960, 446185740, 446185740, 2059318800, 2059318800, 5736673800, 5736673800, 22181805360, 22181805360, 644658718275, 1289317436550, 1213475234400]

cp's OEIS Frontend

A334724 Denominator of the sum of all elements of the n X n matrix M with M[i,j] = (-1)^(i+j)*i/j for i,j = 1..n.

Table of values

List of values