Denominators of 6*(sum(1/binomial(2*k,k),k=1..n)-1/3), n>=1.

A130548

Denominators of 6*(sum(1/binomial(2*k,k),k=1..n)-1/3), n>=1.

Terms

    a(0) =1a(1) =1a(2) =10a(3) =70a(4) =105a(5) =2310a(6) =5460a(7) =20020a(8) =340340a(9) =6466460a(10) =461890a(11) =37182145a(12) =106234700a(13) =25160850a(14) =55454513400a(16) =573029971800

External references