a(n) = (a(n-1)*a(n-2) + a(n-2)*a(n-3) + 1)/a(n-4).

A077458

a(n) = (a(n-1)*a(n-2) + a(n-2)*a(n-3) + 1)/a(n-4).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =5a(6) =19a(7) =111a(8) =735a(9) =16739a(10) =651829a(11) =98407827a(12) =87287056369

External references