Half-convolution of sequence A000032 (Lucas) with itself.

Terms

a(0) =4a(1) =2a(2) =7a(3) =11a(4) =27a(5) =41a(6) =84a(7) =137a(8) =270a(9) =435a(10) =826a(11) =1338a(12) =2488a(13) =4024a(14) =7353a(15) =11899a(16) =21461a(17) =34723a(18) =61960a(19) =100255a(20) =177344a(21) =286947a(22) =503892a(23) =815316a(24) =1422892a(25) =2302286a(26) =3996619a(27) =6466667a(28) =11173935a(29) =18079805