Sequence with floating point numbers

[mlb at fxpt.com]

>=Wouter

> see A072346
I'll submit a comment giving the formula for this like A072345's

> http://mathworld.wolfram.com/Hypersphere.html
Is mathworld's expression for the max. "dimension" needlessly complicated?
 
I'm getting just 
  psi(n/2+1) = ln(pi)
...