a(n) = (1^2 + 1)*(2^2 + 1)*(3^2 + 1)*...*(((prime(n) - 1)/2)^2 + 1).
A228120
a(n) = (1^2 + 1)*(2^2 + 1)*(3^2 + 1)*...*(((prime(n) - 1)/2)^2 + 1).
Terms
- a(0) =2a(1) =10a(2) =100a(3) =44200a(4) =1635400a(5) =5315050000a(6) =435834100000
External references
- oeis: A228120