Composition of Lucas numbers A000032 with Fibonacci numbers A000045.

Terms

a(0) =1a(1) =4a(2) =12a(3) =37a(4) =110a(5) =327a(6) =968a(7) =2864a(8) =8469a(9) =25040a(10) =74029a(11) =218856a(12) =647008a(13) =1912753a(14) =5654670a(15) =16716883a(16) =49420052a(17) =146100276a(18) =431915561a(19) =1276869920a(20) =3774804441a(21) =11159436284a(22) =32990587972a(23) =97529916957a(24) =288327225550a(25) =852380393407