Numbers k whose average divisor is nonintegral and divides k.

Terms

a(0) =28a(1) =496a(2) =8128a(3) =950976a(4) =2178540a(5) =33550336a(6) =142990848a(7) =301953024a(8) =459818240a(9) =675347400a(10) =714954240a(11) =995248800a(12) =1379454720a(13) =2701389600a(14) =3288789504a(15) =6720569856a(16) =8589869056a(17) =10200236032a(18) =14254365440a(19) =30600708096a(20) =42763096320a(21) =43861478400a(22) =66433720320a(23) =71271827200