Boustrophedon transform of the Jacobsthal numbers.

Terms

a(0) =0a(1) =1a(2) =3a(3) =9a(4) =31a(5) =111a(6) =453a(7) =2059a(8) =10571a(9) =60651a(10) =386253a(11) =2704659a(12) =20661411a(13) =170990691a(14) =1523975053a(15) =14552848059a(16) =148234015051