a(n) = F(n)*L(n+1) where F=Fibonacci and L=Lucas numbers.

Terms

a(0) =0a(1) =3a(2) =4a(3) =14a(4) =33a(5) =90a(6) =232a(7) =611a(8) =1596a(9) =4182a(10) =10945a(11) =28658a(12) =75024a(13) =196419a(14) =514228a(15) =1346270a(16) =3524577a(17) =9227466a(18) =24157816a(19) =63245987a(20) =165580140a(21) =433494438a(22) =1134903169a(23) =2971215074a(24) =7778742048a(25) =20365011075a(26) =53316291172a(27) =139583862446a(28) =365435296161a(29) =956722026042