An odd power is a number of the form for
an integer and
a positive odd integer. The first few odd powers are 1, 8, 27, 32, 64, 125, 128,
216, 243, 343, 512, ... (OEIS A070265). Amazingly,
the double series of reciprocals of the odd powers
that are congruent to 3 (mod 4) is given by
for 
an integer and 
a positive odd integer. The first few odd powers are 1, 8, 27, 32, 64, 125, 128,
216, 243, 343, 512, ... (OEIS A070265). Amazingly,
the double series of reciprocals of the odd powers
that are congruent to 3 (mod 4) is given by
