Largest squarefree number dividing central binomial coefficient A000984(n).

Terms

a(0) =1a(1) =2a(2) =6a(3) =10a(4) =70a(5) =42a(6) =462a(7) =858a(8) =4290a(9) =24310a(10) =92378a(11) =176358a(12) =1352078a(13) =520030a(14) =222870a(15) =6463230a(16) =200360130a(17) =129644790a(18) =907513530a(19) =1767263190a(20) =22974421470a(21) =134564468610a(22) =526024740930a(23) =22870640910