Denominator of Sum_{i=1..n} 1/C(2*i,i).

Terms

a(0) =1a(1) =2a(2) =3a(3) =60a(4) =420a(5) =630a(6) =13860a(7) =32760a(8) =120120a(9) =2042040a(10) =38798760a(11) =923780a(12) =74364290a(13) =212469400a(14) =150965100a(15) =332727080400