Numbers k such that the number of distinct primes dividing k = number of anti-divisors of k.

Terms

a(0) =1a(1) =3a(2) =4a(3) =12a(4) =24a(5) =30a(6) =36a(7) =114a(8) =120a(9) =156a(10) =174a(11) =516a(12) =576a(13) =744a(14) =804a(15) =834a(16) =894a(17) =1056a(18) =1344a(19) =1356a(20) =1626a(21) =1686a(22) =1884a(23) =2064a(24) =2136a(25) =2274a(26) =2616a(27) =3396a(28) =3414a(29) =3606