a(0)=1; thereafter a(n) = lcm(1, 2, 3, 4, ..., prime(n)).

A056604

a(0)=1; thereafter a(n) = lcm(1, 2, 3, 4, ..., prime(n)).

Terms

    a(0) =1a(1) =2a(2) =6a(3) =60a(4) =420a(5) =27720a(6) =360360a(7) =12252240a(8) =232792560a(9) =5354228880

External references