a(n) = 5*binomial(8*n+10,n)/(4*n+5).

A230390

a(n) = 5*binomial(8*n+10,n)/(4*n+5).

Terms

    a(0) =1a(1) =10a(2) =125a(3) =1760a(4) =26650a(5) =423752a(6) =6978510a(7) =117998400a(8) =2036685765a(9) =35738059500a(10) =635627275767

External references