Numbers k such that sigma(k+1) = 5*phi(k).

Terms

a(0) =2184a(1) =6930a(2) =7020a(3) =7644a(4) =17640a(5) =18564a(6) =23660a(7) =25200a(8) =27404a(9) =71280a(10) =83720a(11) =120834a(12) =129150a(13) =179010a(14) =189630a(15) =191100a(16) =198015a(17) =224664a(18) =228780a(19) =273504a(20) =285480a(21) =302280a(22) =304290a(23) =322335a(24) =328320a(25) =335664a(26) =437580a(27) =443079a(28) =449904a(29) =451044