Bisection of A201207 (half-convolution of the Lucas sequence A000032 with itself); even part.

A203570

Bisection of A201207 (half-convolution of the Lucas sequence A000032 with itself); even part.

Terms

    a(0) =4a(1) =7a(2) =27a(3) =84a(4) =270a(5) =826a(6) =2488a(7) =7353a(8) =21461a(9) =61960a(10) =177344a(11) =503892a(12) =1422892a(13) =3996619a(14) =11173935a(15) =31114236a(16) =86328978a(17) =238764238a(18) =658478176a(19) =1811322045a(20) =4970928809a(21) =13613135152a(22) =37208048132a(23) =101518052904a(24) =276527670100a(25) =752102592271

External references