Numbers n such that phi(n)=4*reversal(n).

Terms

a(0) =10a(1) =20a(2) =40a(3) =50a(4) =80a(5) =210a(6) =420a(7) =630a(8) =711a(9) =831a(10) =840a(11) =2910a(12) =29910a(13) =40320a(14) =80640a(15) =98361a(16) =673140a(17) =865580a(18) =8656341a(19) =466760130a(20) =694602930a(21) =821412711a(22) =23465346510a(23) =40396039620a(24) =63130473930a(25) =234000006510a(26) =464205665820