Find the partial sum 
of the series 
. Give your answer to five decimal places.
Definitions:
Opaque
Describes a material or substance that is not transparent; light cannot pass through it.
Structural Features
The characteristics or components that make up the physical and architectural design of a structure or organism.
Septum Pellucidum
A thin, transparent membrane separating the lateral ventricles of the brain, involved in the circulation of cerebrospinal fluid.
Lateral Ventricles
Cavities in the brain that produce and circulate cerebrospinal fluid, playing a crucial role in cushioning and supporting the brain.
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