Numbers k that divide phi(k)^2 + sigma(k)^2.

Terms

a(0) =1a(1) =2a(2) =10a(3) =45a(4) =65a(5) =180a(6) =212a(7) =222a(8) =369a(9) =588a(10) =810a(11) =864a(12) =1274a(13) =1521a(14) =1836a(15) =2548a(16) =2940a(17) =3114a(18) =3552a(19) =4770a(20) =5496a(21) =5684a(22) =6027a(23) =6642a(24) =8820a(25) =9140a(26) =10464a(27) =10614a(28) =13311a(29) =14688