a(n) = numerator(Sum_{k=0..n} 1/(binomial(2*k,k)*(k+1))).

A145564

a(n) = numerator(Sum_{k=0..n} 1/(binomial(2*k,k)*(k+1))).

Terms

    a(0) =1a(1) =5a(2) =47a(3) =949a(4) =33287a(5) =14273a(6) =7694047a(7) =400101469a(8) =1200312247a(9) =20405339951a(11) =328055232193

External references