63724

Appears in sequences

• Numbers n such that 2*n*k(n) is rational but not an integer, where k(n) is sum of successive remainders when computing the Euclidean algorithm for (1, 1/sqrt(n)) as defined in A086378 (MuPAD program is given there); numbers belonging to A086378 but not to A088900.at n=31A087414
• Main diagonal of triangle A131823: a(n) = A131823(n,n) for n>=0.at n=10A131824
• Constant term in the reduction of the n-th Fibonacci polynomial by x^3->x^2+2x+1.at n=15A192772