A117664 - cp's OEIS frontend

A117664 Denominator of the sum of all elements in the n X n Hilbert matrix M(i,j) = 1/(i+j-1), where i,j = 1..n.

n	a(n)
1	1
2	3
3	10
4	105
5	252
6	2310
7	25740
8	9009
9	136136
10	11639628
11	10581480
12	223092870
13	1029659400
14	2868336900
15	11090902680
16	644658718275
17	606737617200
18	4011209802600
19	140603459396400
20	133573286426580
21	5215718803323600

[1, 3, 10, 105, 252, 2310, 25740, 9009, 136136, 11639628, 10581480, 223092870, 1029659400, 2868336900, 11090902680, 644658718275, 606737617200, 4011209802600, 140603459396400, 133573286426580, 5215718803323600]

cp's OEIS Frontend

A117664 Denominator of the sum of all elements in the n X n Hilbert matrix M(i,j) = 1/(i+j-1), where i,j = 1..n.

Table of values

List of values