Largest squarefree number dividing n-th central binomial coefficient C(n,[ n/2 ]).

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =10a(5) =10a(6) =35a(7) =70a(8) =42a(9) =42a(10) =462a(11) =462a(12) =858a(13) =858a(14) =2145a(15) =4290a(16) =24310a(17) =24310a(18) =92378a(19) =92378a(20) =176358a(21) =176358a(22) =1352078a(23) =1352078a(24) =520030a(25) =520030a(26) =222870a(27) =222870a(28) =6463230a(29) =6463230