Boustrophedon transform of n mod 2.

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =12a(5) =36a(6) =142a(7) =624a(8) =3192a(9) =18256a(10) =116282a(11) =814144a(12) =6219972a(13) =51475776a(14) =458790022a(15) =4381112064a(16) =44625674352a(17) =482962852096