El Gradechi's hybrid coefficients alpha^{4,6}_n.

Terms

a(0) =-264a(1) =-3456a(2) =0a(3) =-23520a(4) =12600a(5) =-88704a(6) =68544a(7) =-250560a(8) =225720a(9) =-591360a(10) =576576a(11) =-1231776a(12) =1255800a(13) =-2338560a(14) =2448000a(15) =-4132224a(16) =4395384a(17) =-6894720a(18) =7405440a(19) =-10977120a(20) =11858616a(21) =-16807296a(22) =18216000a(23) =-24897600a(24) =27027000a(25) =-35852544a(26) =38937024a(27) =-50376480a(28) =54695160a(29) =-69281280