Sum of divisors of central binomial coefficient binomial(n, floor(n/2)).

Terms

a(0) =1a(1) =3a(2) =4a(3) =12a(4) =18a(5) =42a(6) =48a(7) =144a(8) =312a(9) =728a(10) =1152a(11) =2688a(12) =4704a(13) =10080a(14) =13104a(15) =39312a(16) =54432a(17) =127008a(18) =181440a(19) =423360a(20) =1128960a(21) =2419200a(22) =2903040a(23) =6773760a(24) =14999040a(25) =32140800a(26) =74995200a(27) =160704000a(28) =303264000a(29) =626745600