Numbers n such that uphi(n) = uphi(n+1), where uphi(n) is the unitary totient function (A047994).

Terms

a(0) =1a(1) =20a(2) =35a(3) =143a(4) =194a(5) =208a(6) =740a(7) =1119a(8) =1220a(9) =1299a(10) =1419a(11) =1803a(12) =1892a(13) =2232a(14) =2623a(15) =3705a(16) =3716a(17) =3843a(18) =4995a(19) =5031a(20) =5183a(21) =5186a(22) =5635a(23) =7868a(24) =10659a(25) =17948a(26) =18507a(27) =18914a(28) =21007a(29) =23616