a(n) = binomial(10*n + 7, 5*n + 1)/(10*n + 7).

A265103

a(n) = binomial(10*n + 7, 5*n + 1)/(10*n + 7).

Terms

    a(0) =1a(1) =728a(2) =482885a(3) =347993910a(4) =267058714626

External references