Digits of sigma(n) end in phi(n).

Terms

a(0) =1a(1) =6a(2) =84a(3) =112a(4) =141a(5) =294a(6) =1188a(7) =1320a(8) =2508a(9) =4584a(10) =5406a(11) =8850a(12) =14270a(13) =17416a(14) =23320a(15) =31152a(16) =79035a(17) =117576a(18) =125576a(19) =132066a(20) =149877a(21) =160664a(22) =162514a(23) =164024a(24) =167970a(25) =170980a(26) =177744a(27) =184584a(28) =223286a(29) =1119636