Composite squarefree numbers k such that p+1 divides k-1 for any prime p dividing k.

Terms

a(0) =385a(1) =2737a(2) =6061a(3) =6721a(4) =17641a(5) =24769a(6) =25201a(7) =31521a(8) =34561a(9) =49105a(10) =66385a(11) =76609a(12) =79401a(13) =113221a(14) =136081a(15) =180481a(16) =194833a(17) =199801a(18) =254881a(19) =268801a(20) =311905a(21) =321937a(22) =328321a(23) =362881a(24) =436645a(25) =469201a(26) =506521a(27) =545905a(28) =547561a(29) =558145