Cubes sandwiched between squarefree numbers.

Terms

a(0) =216a(1) =1728a(2) =46656a(3) =74088a(4) =157464a(5) =216000a(6) =287496a(7) =373248a(8) =474552a(9) =592704a(10) =729000a(11) =884736a(12) =1061208a(13) =1259712a(14) =1481544a(15) =2299968a(16) =2628072a(17) =2985984a(18) =3375000a(19) =3796416a(20) =4251528a(21) =5832000a(22) =6434856a(23) =7762392a(24) =8489664a(25) =9261000a(26) =10077696a(27) =10941048a(28) =11852352a(29) =12812904