a(1)=2, a(n+1) is the smallest integer > a(n) such that the smallest prime factor of a(n+1) is the largest prime factor of a(n).
A057602
a(1)=2, a(n+1) is the smallest integer > a(n) such that the smallest prime factor of a(n+1) is the largest prime factor of a(n).
Terms
- a(0) =2a(1) =4a(2) =6a(3) =9a(4) =15a(5) =25a(6) =35a(7) =49a(8) =77a(9) =121a(10) =143a(11) =169a(12) =221a(13) =289a(14) =323a(15) =361a(16) =437a(17) =529a(18) =667a(19) =841a(20) =899a(21) =961a(22) =1147a(23) =1369a(24) =1517a(25) =1681a(26) =1763a(27) =1849a(28) =2021a(29) =2209
External references
- oeis: A057602