Sum of non-unitary divisors of central binomial coefficient C(n, floor(n/2)).

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =12a(6) =0a(7) =0a(8) =72a(9) =328a(10) =0a(11) =768a(12) =1344a(13) =4032a(14) =3024a(15) =9072a(16) =0a(17) =36288a(18) =0a(19) =120960a(20) =322560a(21) =967680a(22) =0a(23) =1935360a(24) =6013440a(25) =15966720a(26) =43545600a(27) =104094720a(28) =163296000a(29) =362361600