Composite numbers n with the property that phi(n) divides (n-1)^2.

Terms

a(0) =561a(1) =1105a(2) =1729a(3) =2465a(4) =6601a(5) =8481a(6) =12801a(7) =15841a(8) =16705a(9) =19345a(10) =22321a(11) =30889a(12) =41041a(13) =46657a(14) =50881a(15) =52633a(16) =71905a(17) =75361a(18) =88561a(19) =93961a(20) =115921a(21) =126673a(22) =162401a(23) =172081a(24) =193249a(25) =247105a(26) =334153a(27) =340561a(28) =378561a(29) =449065