a(n) = A163085(n)/(floor(n/2)!)^2.

A216629

a(n) = A163085(n)/(floor(n/2)!)^2.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =12a(4) =18a(5) =540a(6) =1200a(7) =168000a(8) =735000a(9) =463050000a(10) =4667544000

External references