Numbers n such that determinant[{{n,phi(n)},{n+1,phi(n+1)}}]is a perfect square.

Terms

a(0) =2a(1) =26a(2) =34a(3) =68a(4) =124a(5) =160a(6) =188a(7) =342a(8) =602a(9) =776a(10) =3104a(11) =6324a(12) =14688a(13) =17170a(14) =35894a(15) =94500a(16) =97094a(17) =111036a(18) =113102a(19) =122180a(20) =138096a(21) =150314a(22) =150624a(23) =195396a(24) =270106a(25) =496706a(26) =1035380a(27) =1318064a(28) =1428542a(29) =1445120