219702

Appears in sequences

• Chebyshev transform of A107841.at n=7A160852
• a(n) is the number of reducible monic quartic polynomials (x^4 + r*x^3 + s*x^2 + t*x + u) with integer coefficients bounded by naïve height n (abs(r), abs(s), abs(t), abs(u) <= n).at n=20A358399