Number of 2-sided strip polypons with n cells.

Terms

a(0) =1a(1) =2a(2) =1a(3) =3a(4) =2a(5) =5a(6) =4a(7) =9a(8) =8a(9) =16a(10) =16a(11) =28a(12) =30a(13) =51a(14) =58a(15) =96a(16) =112a(17) =179a(18) =216a(19) =334a(20) =406a(21) =624a(22) =776a(23) =1178a(24) =1472a(25) =2216a(26) =2796a(27) =4163a(28) =5260a(29) =7833