a(n) = 3*binomial(10*n+6,n)/(5*n+3).

A234529

a(n) = 3*binomial(10*n+6,n)/(5*n+3).

Terms

    a(0) =1a(1) =6a(2) =75a(3) =1190a(4) =21285a(5) =409266a(6) =8259888a(7) =172593900a(8) =3701885490a(9) =81033954430

External references