Numbers m such that sigma(m+1)+sigma(m-1) = 6*phi(m).

Terms

a(0) =34a(1) =55a(2) =141a(3) =322a(4) =664a(5) =988a(6) =1149a(7) =1505a(8) =2230a(9) =2631a(10) =2906a(11) =2912a(12) =8559a(13) =11194a(14) =18215a(15) =18754a(16) =57104a(17) =60599a(18) =62881a(19) =64604a(20) =78759a(21) =81580a(22) =96304a(23) =96944a(24) =97220a(25) =98944a(26) =99164a(27) =126520a(28) =182495a(29) =192417