Binomial coefficient ( n, squarefree kernel(n) ).

Terms

a(0) =1a(1) =1a(2) =1a(3) =6a(4) =1a(5) =1a(6) =1a(7) =28a(8) =84a(9) =1a(10) =1a(11) =924a(12) =1a(13) =1a(14) =1a(15) =120a(16) =1a(17) =18564a(18) =1a(19) =184756a(20) =1a(21) =1a(22) =1a(23) =134596a(24) =53130a(25) =1a(26) =2925a(27) =40116600a(28) =1a(29) =1