a(n) is the number of distinct solution sets to the quadratic equations u*x^2 + v*x + w = 0 with integer coefficients u, v, w, abs(u) + abs(v) + abs(w) <= n having a nonnegative discriminant.
A379597
a(n) is the number of distinct solution sets to the quadratic equations u*x^2 + v*x + w = 0 with integer coefficients u, v, w, abs(u) + abs(v) + abs(w) <= n having a nonnegative discriminant.
Terms
- a(0) =1a(1) =4a(2) =12a(3) =24a(4) =50a(5) =80a(6) =134a(7) =192a(8) =276a(9) =366a(10) =510a(11) =632a(12) =834a(13) =1018a(14) =1262a(15) =1502a(16) =1858a(17) =2136a(18) =2584a(19) =2956a(20) =3448a(21) =3910a(22) =4576a(23) =5076a(24) =5834a(25) =6488a(26) =7320a(27) =8066a(28) =9136a(29) =9892
External references
- oeis: A379597