Imaginary part of Propp's cubic recurrence starting with i (i^2=-1).

A086890

Imaginary part of Propp's cubic recurrence starting with i (i^2=-1).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-1a(5) =-2a(6) =0a(7) =-10a(8) =29a(9) =-689a(10) =79779a(11) =-306741785

External references