Number of tilings of a 5 X n rectangle using n pentominoes of shapes L, X.

Terms

a(0) =1a(1) =0a(2) =2a(3) =0a(4) =4a(5) =2a(6) =8a(7) =8a(8) =16a(9) =24a(10) =36a(11) =64a(12) =88a(13) =160a(14) =224a(15) =392a(16) =576a(17) =960a(18) =1472a(19) =2368a(20) =3728a(21) =5888a(22) =9376a(23) =14720a(24) =23488a(25) =36896a(26) =58752a(27) =92544a(28) =146944a(29) =232064