133424

Appears in sequences

• Maximal number of regions into which 4-space can be divided by n hyperspheres.at n=37A059173
• a(1)=a(2)=1; thereafter, a(n+1) = a(n) + a(n-1) + 1 if n is a multiple of 5, otherwise a(n+1) = a(n) + a(n-1).at n=25A124502