Integers x such that sigma(x)^2 - 3*x^2 is a square.

Terms

a(0) =4a(1) =6a(2) =28a(3) =45a(4) =48a(5) =60a(6) =156a(7) =208a(8) =360a(9) =496a(10) =1170a(11) =2016a(12) =2520a(13) =2925a(14) =5733a(15) =7605a(16) =8128a(17) =166617a(18) =167580a(19) =380160a(20) =659044a(21) =964080a(22) =1085760a(23) =1539900a(24) =1571328a(25) =1693440a(26) =1778400a(27) =2069613a(28) =2224800a(29) =2306304