a(n) = L(n+1) * L(n) * L(n-1) * L(n-2) / 6, where L(n) = Lucas numbers (A000032).

A247526

a(n) = L(n+1) * L(n) * L(n-1) * L(n-2) / 6, where L(n) = Lucas numbers (A000032).

Terms

    a(0) =-1a(1) =-1a(2) =4a(3) =14a(4) =154a(5) =924a(6) =6699a(7) =44979a(8) =310764a(9) =2123554a(10) =14571974a(11) =99833524a(12) =684385079a(13) =4690541639a(14) =32150245204a(15) =220358978774

External references