133980

Appears in sequences

• Number of 5-unbalanced strings of length n (=2^n-A027560(n)).at n=18A027562
• Numbers n such that 257*2^n-1 is prime.at n=30A050887
• Numbers j such that j and 2j are both between a pair of twin primes.at n=32A066388
• Numbers k such that k-1, k+1, k^2+1 and k^4+1 are all prime numbers.at n=12A070156
• Integers which have more than one coprime factorization into nonprime powers which sum to the same number.at n=12A072940
• Numbers with prime factorization pqrstu^2.at n=10A189985
• Numbers m such that exactly four subsets of {m-1, m, m+1} sum up to a prime number.at n=35A221310
• Numbers n such that n is the average of four consecutive primes n-13, n-1, n+1 and n+13.at n=19A260959