Numbers of the form x^2 + y^2 + z^2 = phi(x*y*z) + sigma(x*y*z).

Terms

a(0) =9a(1) =14a(2) =19a(3) =51a(4) =99a(5) =243a(6) =339a(7) =579a(8) =723a(9) =1059a(10) =1640a(11) =1683a(12) =1923a(13) =2739a(14) =3363a(15) =3699a(16) =4419a(17) =5619a(18) =6963a(19) =7443a(20) =8979a(21) =10083a(22) =10659a(23) =12483a(24) =13779a(25) =15843a(26) =18819a(27) =20403a(28) =21219a(29) =22899