Number of strong elementary edge-subgraphs in Moebius ladder M_n.

Terms

a(0) =6a(1) =21a(2) =26a(3) =81a(4) =129a(5) =349a(6) =650a(7) =1614a(8) =3281a(9) =7772a(10) =16565a(11) =38265a(12) =83635a(13) =190656a(14) =422266a(15) =955967a(16) =2131986a(17) =4809229a(18) =10764221a(19) =24235939a(20) =54347662a(21) =122246248a(22) =274396853a(23) =616899656a(24) =1385407029