Numbers k such that sigma(k) + phi(k) = psi(k) + k.

Terms

a(0) =1a(1) =672a(2) =3120a(3) =7800a(4) =11904a(5) =23712a(6) =55552a(7) =195072a(8) =302784a(9) =492864a(10) =910336a(11) =1607808a(12) =1671072a(13) =1750656a(14) =6688560a(15) =13210368a(16) =15242496a(17) =16125952a(18) =16721400a(19) =17033984a(20) =17274624a(21) =26854656a(22) =56755968a(23) =633404992a(24) =805208064a(25) =874527872a(26) =904786944a(27) =1524577280a(28) =2059528512a(29) =2226866176