a(n) = Sum_{0<=i<j<k<=n} L(i)*L(j)*L(k), where L(m) is the m-th Lucas number A000032(m).

A213807

a(n) = Sum_{0<=i<j<k<=n} L(i)*L(j)*L(k), where L(m) is the m-th Lucas number A000032(m).

Terms

    a(0) =0a(1) =0a(2) =6a(3) =50a(4) =295a(5) =1450a(6) =6706a(7) =29790a(8) =129900a(9) =559680a(10) =2395701a(11) =10212620a(12) =43430140a(13) =184412740a(14) =782337466a(15) =3317046390a(16) =14059122315a(17) =59576034630a(18) =252422169726

External references