Number of 1-sided polypons with n cells.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =7a(5) =15a(6) =24a(7) =49a(8) =91a(9) =183a(10) =356a(11) =734a(12) =1465a(13) =3017a(14) =6153a(15) =12721a(16) =26230a(17) =54575a(18) =113480a(19) =237296a(20) =496612a(21) =1042785a(22) =2192207a(23) =4619736a(24) =9747966a(25) =20607348