xt+1 = a xt (1.0 - xt) - 0.05 (yt + 0.35)(1.0 - 2 zt)
yt+1 = 0.1 ((yt + 0.35 )(1.0 + 2 zt) - 1.0)(1.0 - 1.9 xt)
zt+1 = 3.78 zt(1.0 - zt) + b yt

parameters: a = 3.8, b =  0.2
Lyapunov exponents (log with base-e): 0.4312, 0.3776, -3.3009

Lyapunov dimension: 2.2450

Reference

An equation for hyperchaos

Otto Eberhard Rössler

Physics Letters A 71, 155-157 (1979)

DOI: 10.1016/0375-9601(79)90150-6