a(1)=2; thereafter a(n) = mpf(1+Product_{k=1..n-1} a(k)), where mpf(n) = f-th prime factor with multiplicity of n, for f=ceiling(bigomega(n)/2).

A261564

a(1)=2; thereafter a(n) = mpf(1+Product_{k=1..n-1} a(k)), where mpf(n) = f-th prime factor with multiplicity of n, for f=ceiling(bigomega(n)/2).

Terms

    a(0) =2a(1) =3a(2) =7a(3) =43a(4) =13a(5) =53a(6) =5a(7) =6221671a(9) =25621a(10) =10300271a(11) =2731

External references