66887

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 51 ones.at n=8A031819
• T(n,2), array T as in A054126.at n=12A054128
• Integers arising in A133677.at n=35A133645
• Semiprimes of the form S(n) + T(n) where S(n) and T(n) are the n-th square and the n-th triangular numbers.at n=29A240914