Let b(n) denote the Lucas numbers, A000032: a(n) = Sum{k=0..n}C(n,k)^2*(n-k)!*b(k).

A105217

Let b(n) denote the Lucas numbers, A000032: a(n) = Sum{k=0..n}C(n,k)^2*(n-k)!*b(k).

Terms

    a(0) =2a(1) =3a(2) =11a(3) =61a(4) =431a(5) =3626a(6) =35124a(7) =383783a(8) =4662223a(9) =62276683a(10) =906637753a(11) =14280356652a(12) =241859495794

External references