A273788 Least number k such that k^2 + k^3 is of the form x^2 + y^3 in exactly n ways where x, y > 0.
1, 6, 24, 40, 180, 440, 3640, 18480, 137280, 1320, 703560, 15960, 1256640, 1436160, 96360
Offset: 1
Examples
a(2) = 6 because 6^2 + 6^3 = 15^2 + 3^3.
Extensions
a(7)-a(15) from Giovanni Resta, Jun 03 2016