Unitary untouchable numbers: us(x) = n has no solution where us(x) (A063919) is the sum of the proper unitary divisors of x.

A063948

Unitary untouchable numbers: us(x) = n has no solution where us(x) (A063919) is the sum of the proper unitary divisors of x.

Terms

    a(0) =2a(1) =3a(2) =4a(3) =5a(4) =7a(5) =374a(6) =702a(7) =758a(8) =998a(9) =1542a(10) =1598a(11) =1778a(12) =1808a(13) =1830a(14) =1974a(15) =2378a(16) =2430a(17) =2910a(18) =3164a(19) =3182a(20) =3188a(21) =3216a(22) =3506a(23) =3540a(24) =3666a(25) =3698a(26) =3818a(27) =3846a(28) =3986a(29) =4196

External references