A216629 a(n) = A163085(n)/(floor(n/2)!)^2.

1, 1, 2, 12, 18, 540, 1200, 168000, 735000, 463050000, 4667544000, 12938431968000, 332086420512000, 3989022083190144000, 279394363051195392000, 14383221809875538780160000, 2892376010829659126572800000, 632822947409421120302862912000000

Offset: 0

Author

Peter Luschny, Sep 18 2012

Keywords

• nonn

Crossrefs

Cf. A069651.

Programs

Sage

def A216629(n): return A163085(n)/factorial(n//2)^2
[A216629(n) for n in (0..17)]