A273788 - OEIS

%I #10 Jun 09 2016 03:32:05

%S 1,6,24,40,180,440,3640,18480,137280,1320,703560,15960,1256640,

%T 1436160,96360

%N 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.

%e a(2) = 6 because 6^2 + 6^3 = 15^2 + 3^3.

%Y Cf. A011379, A060835, A122054.

%K nonn,more

%O 1,2

%A _Altug Alkan_, May 30 2016

%E a(7)-a(15) from _Giovanni Resta_, Jun 03 2016