Smallest numbers such that the number of terms in inverse set usigma equals n; where usigma = A034448.

A063975

Smallest numbers such that the number of terms in inverse set usigma equals n; where usigma = A034448.

Terms

    a(0) =1a(1) =12a(2) =24a(3) =60a(4) =120a(5) =72a(6) =216a(7) =288a(8) =1320a(9) =480a(10) =240a(11) =840a(12) =1296a(13) =2700a(14) =960a(15) =1512a(16) =1080a(17) =720a(18) =1728a(19) =2016a(20) =3840a(21) =3240a(22) =3456a(23) =2520a(24) =3360a(25) =3024a(26) =1440a(27) =3600a(28) =6912a(29) =2160

External references