2^floor(log[2](n+1))*(2*n+1)!*Bernoulli(2*n,1/2).

A238164

2^floor(log[2](n+1))*(2*n+1)!*Bernoulli(2*n,1/2).

Terms

    a(0) =1a(1) =-1a(2) =7a(3) =-465a(4) =48006a(5) =-12072375a(6) =6301495035

External references