a(n) = lcm(1,2,3,...,prime(n))/(1 + 2 + ... + prime(n)).

A109923

a(n) = lcm(1,2,3,...,prime(n))/(1 + 2 + ... + prime(n)).

Terms

    a(0) =1a(1) =4a(2) =15a(3) =420a(4) =3960a(5) =80080a(6) =1225224a(7) =19399380a(8) =5354228880a(9) =145568097675

External references