Central binomial coefficient A001405(n) divided by its characteristic cube divisor A056201(n).

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =10a(5) =20a(6) =35a(7) =70a(8) =126a(9) =252a(10) =462a(11) =924a(12) =1716a(13) =429a(14) =6435a(15) =12870a(16) =24310a(17) =48620a(18) =92378a(19) =184756a(20) =352716a(21) =88179a(22) =1352078a(23) =2704156a(24) =5200300a(25) =1300075a(26) =742900a(27) =185725a(28) =9694845a(29) =155117520