11859210

Appears in sequences

• a(n) = smallest number m such that for all k > m, either k or k+1 has a prime factor > prime(n).at n=7A002072
• a(n) = smallest number m such that for all k > m, either k or k+1 has a prime factor > prime(n).at n=8A002072
• Numbers k such that both k and k + 1 are logarithmically smooth.at n=20A116486
• Largest number x such that x and x+1 are prime(n)-smooth but not prime(n-1)-smooth.at n=7A145606
• Integers n such that for all i > n the largest prime factor of i*(i+1) exceeds the largest prime factor of n*(n+1).at n=7A193943
• Numbers k such that k and k+1 are both divisible by the cube of their largest prime factor.at n=1A354562
• Numbers k such that P(k)^2 | k and P(k+1)^3 | (k+1), where P(k) = A006530(k) is the largest prime dividing k.at n=16A354563
• Numbers k such that P(k)^3 | k and P(k+1)^2 | (k+1), where P(k) = A006530(k) is the largest prime dividing k.at n=13A354564
• Numbers k such that P(k)^2 | k and P(k+1)^4 | (k+1), where P(k) = A006530(k) is the largest prime dividing k.at n=7A354565
• Numbers k such that P(k)^4 | k and P(k+1)^2 | (k+1), where P(k) = A006530(k) is the largest prime dividing k.at n=1A354566
• a(n) is the least number k such that P(k)^n | k and P(k+1)^n | (k+1), where P(k) = A006530(k) is the largest prime dividing k, or -1 if no such k exists.at n=3A354567