a(n) = (n!)*2^(n-1)*mu_h(n) where mu_h is the hypergeometric Moebius function associated to the Dirichlet character modulo 4 h={1,0,-1,0,1,...} (see comment).

A298510

a(n) = (n!)*2^(n-1)*mu_h(n) where mu_h is the hypergeometric Moebius function associated to the Dirichlet character modulo 4 h={1,0,-1,0,1,...} (see comment).

Terms

    a(0) =1a(1) =-1a(2) =5a(3) =-15a(4) =-489a(5) =-2865a(6) =35685a(7) =-135135a(8) =-5897745a(9) =58437855a(10) =3061162125a(11) =-39296062575

External references