a(n) = Product_{i=1..n} ((i+5)*(i+6)*(i+7)*(i+8)*(i+9))/(i*(i+1)*(i+2)*(i+3)*(i+4)).

A047831

a(n) = Product_{i=1..n} ((i+5)*(i+6)*(i+7)*(i+8)*(i+9))/(i*(i+1)*(i+2)*(i+3)*(i+4)).

Terms

    a(0) =1a(1) =252a(2) =19404a(3) =731808a(4) =16818516a(5) =267227532a(6) =3184461423a(7) =30107635272a(8) =235234907908

External references