49281

Appears in sequences

• Smallest squarefree integer k such that Q(sqrt(k)) has class number n.at n=28A081363
• Smallest d such that real quadratic field with discriminant d has class number n.at n=28A081364
• Semiprimes in A007504 (the sum of first n primes).at n=35A189072
• a(1)=4, a(2)=3, a(n) = 4*a(n-1) + 3*a(n-2).at n=7A189742
• Least positive squarefree integer k such that Q(sqrt(k)) has a class number greater than that of any previous integer.at n=13A279908
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 233", based on the 5-celled von Neumann neighborhood.at n=30A286968