Number k such that both k and k+1 have an equal number of unitary and nonunitary divisors.

Terms

a(0) =135a(1) =296a(2) =343a(3) =375a(4) =1160a(5) =1431a(6) =1592a(7) =1624a(8) =2295a(9) =2456a(10) =2727a(11) =3429a(12) =3591a(13) =3624a(14) =3752a(15) =3992a(16) =4023a(17) =4184a(18) =4887a(19) =4913a(20) =5048a(21) =5144a(22) =5319a(23) =5480a(24) =6183a(25) =6344a(26) =6375a(27) =6858a(28) =7479a(29) =7624