Composite numbers k of the form 4u+1 for which the odd part of phi(k) divides k-1.

Terms

a(0) =85a(1) =561a(2) =1105a(3) =1261a(4) =1285a(5) =2465a(6) =4369a(7) =6601a(8) =8245a(9) =8481a(10) =9061a(11) =9605a(12) =10585a(13) =16405a(14) =16705a(15) =17733a(16) =18721a(17) =19669a(18) =21845a(19) =23001a(20) =28645a(21) =30889a(22) =38165a(23) =42121a(24) =43165a(25) =46657a(26) =54741a(27) =56797a(28) =57205a(29) =62745