A119784 - cp's OEIS frontend

A119784 Numerator of Sum[Sum[(-1)^(i+1)1/(ij)^2, {i, 1, n}], {j, 1, n}].

n	a(n)
1	1
2	15
3	1519
4	23575
5	15907111
6	5224037
7	13034567237
8	206747823917
9	51412399560631
10	10224262569323
11	152012226379719803
12	151406414338463843
13	4372018721271579430163
14	4359099317599237566323
15	21975413631947472215359

[1, 15, 1519, 23575, 15907111, 5224037, 13034567237, 206747823917, 51412399560631, 10224262569323, 152012226379719803, 151406414338463843, 4372018721271579430163, 4359099317599237566323, 21975413631947472215359]

cp's OEIS Frontend

A119784 Numerator of Sum[Sum[(-1)^(i+1)1/(ij)^2, {i, 1, n}], {j, 1, n}].

Table of values

List of values

cp's OEIS Frontend

A119784 Numerator of Sum[Sum[(-1)^(i+1)*1/(i*j)^2, {i, 1, n}], {j, 1, n}].

Table of values

List of values

A119784 Numerator of Sum[Sum[(-1)^(i+1)1/(ij)^2, {i, 1, n}], {j, 1, n}].