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).
A358399
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).
Terms
- a(0) =47a(1) =271a(2) =810a(3) =1849a(4) =3395a(5) =5832a(6) =8915a(7) =13242a(8) =18465a(9) =25267a(10) =32874a(11) =43023a(12) =53662a(13) =66957a(14) =81770a(15) =99374a(16) =117564a(17) =140303a(18) =163048a(19) =190757a(20) =219702a(21) =252465a(22) =285820a(23) =326853a(24) =366732
External references
- oeis: A358399