61133

Appears in sequences

• Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 17.at n=41A051982
• Solutions k of the equation phi(k) = phi(k-1) + phi(k-2). Also known as Phibonacci numbers.at n=26A065557
• Composite numbers k such that phi(k) = phi(k-1) + phi(k-2).at n=5A065572
• Number of distinct solutions of sum{i=1..3}(x(2i-1)*x(2i)) = 1 (mod n), with x() in 0..n-1.at n=18A180805
• The number of triangles in an equipotential triangle divided by medians into n rows of smaller triangles.at n=19A210687
• Triangle read by rows: T(n,k) is the coefficient A_k in the transformation of 1 + x + x^2 + ... + x^n to the polynomial A_k*(x-k)^k for 0 <= k <= n.at n=62A242598