Numbers whose numerator and denominator of the harmonic mean of their divisors are both 3-smooth numbers.

A348867

Numbers whose numerator and denominator of the harmonic mean of their divisors are both 3-smooth numbers.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =6a(4) =28a(5) =40a(6) =84a(7) =120a(8) =135a(9) =224a(10) =270a(11) =672a(12) =819a(13) =1638a(14) =3780a(15) =10880a(16) =13392a(17) =30240a(18) =32640a(19) =32760a(20) =167400a(21) =950976a(22) =1303533a(23) =2178540a(24) =2607066a(25) =3138345a(26) =4713984a(27) =6276690a(28) =8910720a(29) =14705145

External references