Numbers n such that the numbers of divisors of n,n+1 and n+2 are k,2k,4k respectively for some k.

Terms

a(0) =193a(1) =397a(2) =454a(3) =457a(4) =613a(5) =614a(6) =661a(7) =757a(8) =758a(9) =997a(10) =998a(11) =1093a(12) =1237a(13) =1238a(14) =1453a(15) =1478a(16) =1657a(17) =1681a(18) =1766a(19) =2137a(20) =2341a(21) =2413a(22) =2455a(23) =2593a(24) =2917a(25) =2918a(26) =2942a(27) =2966a(28) =3217a(29) =3334