Central terms of the triangle in A199333: a(n) = A199333(n,[n/2]).

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =7a(5) =13a(6) =29a(7) =53a(8) =107a(9) =211a(10) =431a(11) =809a(12) =1619a(13) =3037a(14) =6079a(15) =11467a(16) =22937a(17) =43541a(18) =87083a(19) =166183a(20) =332393a(21) =636761a(22) =1273541a(23) =2448049a(24) =4896103a(25) =9438851a(26) =18877711a(27) =36484271a(28) =72968563a(29) =141332173