Achilles numbers - powerful but imperfect: if n = Product(p_i^e_i) then all e_i > 1 (i.e., powerful), but the highest common factor of the e_i is 1, i.e., not a perfect power.
A052486
Achilles numbers - powerful but imperfect: if n = Product(p_i^e_i) then all e_i > 1 (i.e., powerful), but the highest common factor of the e_i is 1, i.e., not a perfect power.
Terms
- a(0) =72a(1) =108a(2) =200a(3) =288a(4) =392a(5) =432a(6) =500a(7) =648a(8) =675a(9) =800a(10) =864a(11) =968a(12) =972a(13) =1125a(14) =1152a(15) =1323a(16) =1352a(17) =1372a(18) =1568a(19) =1800a(20) =1944a(21) =2000a(22) =2312a(23) =2592a(24) =2700a(25) =2888a(26) =3087a(27) =3200a(28) =3267a(29) =3456
External references
- oeis: A052486