Denominator of Sum_{k = 0..n} 1/((k+1)*(2*k+1)).

A111876

Denominator of Sum_{k = 0..n} 1/((k+1)*(2*k+1)).

Terms

    a(0) =1a(1) =6a(2) =30a(3) =420a(4) =1260a(5) =13860a(6) =180180a(7) =72072a(8) =1225224a(9) =116396280a(10) =116396280a(11) =2677114440a(12) =13385572200a(13) =5736673800a(14) =166363540200

External references