a(-1) = 4, a(0) = 5; thereafter a(n) = 4 + (Product_{k=1..n} prime(k))^2.
A055497
a(-1) = 4, a(0) = 5; thereafter a(n) = 4 + (Product_{k=1..n} prime(k))^2.
Terms
- a(0) =4a(1) =5a(2) =8a(3) =40a(4) =904a(5) =44104a(6) =5336104a(7) =901800904a(8) =260620460104
External references
- oeis: A055497