Denominator of Sum_{k=0..n} 1/C(3*n, 3*k).

A100515

Denominator of Sum_{k=0..n} 1/C(3*n, 3*k).

Terms

    a(0) =1a(1) =1a(2) =20a(3) =42a(4) =4620a(5) =5005a(6) =2042040a(7) =1763580a(8) =59491432a(9) =95611230a(10) =776363187600a(11) =235953517800a(13) =143627189706

External references