a(n) = L(4*n+2)/3, where L=A000032 (the Lucas sequence).

A049685

a(n) = L(4*n+2)/3, where L=A000032 (the Lucas sequence).

Terms

    a(0) =1a(1) =6a(2) =41a(3) =281a(4) =1926a(5) =13201a(6) =90481a(7) =620166a(8) =4250681a(9) =29134601a(10) =199691526a(11) =1368706081a(12) =9381251041a(13) =64300051206a(14) =440719107401

External references