Number of tilings of a 16 X n rectangle using 2n octominoes of shape I.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =11a(9) =23a(10) =37a(11) =53a(12) =71a(13) =91a(14) =113a(15) =137a(16) =324a(17) =665a(18) =1206a(19) =1999a(20) =3102a(21) =4579a(22) =6500a(23) =8941a(24) =14428a(25) =24963a(26) =43558a(27) =74221a(28) =122158a(29) =193995