55805

Appears in sequences

• a(n) is the smallest semiprime such that difference between a(n) and next semiprime, b(n), is n.at n=25A131109
• a(n) = least member of A006881 whose difference from the following one equals n, or 0 if no such semiprime exists.at n=25A140784
• Numbers k such that sum of the divisors of k equals the sum of the reversals of the divisors of k. Numbers with all palindrome divisors are not in the sequence.at n=24A196677
• a(n) is the smallest semiprime followed by gap (to the next semiprime) equal to n-th semiprime.at n=9A278349