a(n) is the least positive x such that x^3 + x + n^2 is a perfect square, or 0 if no such x exists.

Terms

a(0) =0a(1) =72a(2) =4128a(3) =8a(4) =262272a(5) =1000200a(6) =44a(7) =7529928a(8) =16777728a(9) =34012872a(10) =64000800a(11) =113380872a(12) =191104128a(13) =308917128a(14) =12a(15) =729001800a(16) =4a(17) =1544806728a(18) =32a(19) =3010939272a(20) =4096003200a(21) =8a(22) =7256317728a(23) =9474301128a(24) =80a(25) =15625005000a(26) =19770615072a(27) =24794917128a(28) =30840985728a(29) =38068699272