Binomial coefficient C(8n, n-1).

A004382

Binomial coefficient C(8n, n-1).

Terms

    a(0) =1a(1) =16a(2) =276a(3) =4960a(4) =91390a(5) =1712304a(6) =32468436a(7) =621216192a(8) =11969016345a(9) =231900297200

External references