Numbers n such that there is an integer k with the property that k^tau(n) = sigma(n).

Terms

a(0) =1a(1) =3a(2) =217a(3) =862a(4) =1177a(5) =1207a(6) =1219a(7) =3937a(8) =8743a(9) =9481a(10) =13822a(11) =18137a(12) =19567a(13) =19849a(14) =20057a(15) =20257a(16) =20299a(17) =20437a(18) =33607a(19) =57337a(20) =91847a(21) =96217a(22) =100579a(23) =103897a(24) =154969a(25) =157921a(26) =158623a(27) =228889a(28) =233047a(29) =304117