-7553

Appears in sequences

• Consider primitive pairs of integers (b, c) with b < 0 such that x^5 + b*x + c = 0 is irreducible and solvable by radicals: sequence gives values of b.at n=15A371557
• a(n) = Sum_{i=1..n} i^2*(-1)^ceiling(sqrt(i)).at n=44A392677