-5200

Appears in sequences

• Sum_{k=1..n-1} J(2*n,k)*k^2, where J(i,j) is the Jacobi symbol.at n=51A097543
• Sum_{k=1..2n-1} J(4*n,k)*k^2, where J(i,j) is the Jacobi symbol.at n=25A097544
• Coefficient triangle of numerator polynomials appearing in certain column o.g.f.s related to the H-atom spectrum.at n=34A120078
• Determinant of the n X n matrix with (i,j)-entry equal to 1 or 0 according as |i-j| is prime or not.at n=21A228638
• a(n) = a(n-1) - n*a(n-2); a(0) = a(1) = 1.at n=11A286032