Binomial convolution of the binomial coefficients bin(3n,n)/(2n+1) (A001764).

A188912

Binomial convolution of the binomial coefficients bin(3n,n)/(2n+1) (A001764).

Terms

    a(0) =1a(1) =2a(2) =8a(3) =42a(4) =260a(5) =1816a(6) =13962a(7) =116094a(8) =1029124a(9) =9609144a(10) =93569808a(11) =942642696a(12) =9763181946a(13) =103455616400

External references