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 second of these numbers.
A137800
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 second of these numbers.
Terms
- a(0) =27a(1) =125a(2) =147a(3) =539a(4) =2197a(5) =2992a(6) =3249a(7) =50255a(8) =11774a(9) =15717a(10) =62271a(11) =265680a(12) =172000a(13) =34122a(14) =1133458a(15) =2313744a(16) =1060851a(17) =332387a(18) =1334232a(19) =404931a(20) =1388583a(21) =1357299a(22) =15800793a(23) =5516390a(24) =66896138a(25) =11962935a(26) =6085090a(27) =129761884a(28) =43216624a(29) =90972640
External references
- oeis: A137800