Consider the first run of composites that contains at least two numbers whose largest prime factor is prime(n), n >= 2. a(n) is the first of these numbers.
A137799
Consider the first run of composites that contains at least two numbers whose largest prime factor is prime(n), n >= 2. a(n) is the first of these numbers.
Terms
- a(0) =24a(1) =120a(2) =140a(3) =528a(4) =2184a(5) =2975a(6) =3230a(7) =50232a(8) =11745a(9) =15686a(10) =62234a(11) =265639a(12) =171957a(13) =34075a(14) =1133405a(15) =2313685a(16) =1060790a(17) =332320a(18) =1334161a(19) =404858a(20) =1388504a(21) =1357216a(22) =15800704a(23) =5516293a(24) =66896037a(25) =11962832a(26) =6084983a(27) =129761775a(28) =43216511a(29) =90972513
External references
- oeis: A137799