Number of independent vertex sets in the Moebius ladder graph with 2n nodes (n >= 0).

Terms

a(0) =1a(1) =3a(2) =5a(3) =15a(4) =33a(5) =83a(6) =197a(7) =479a(8) =1153a(9) =2787a(10) =6725a(11) =16239a(12) =39201a(13) =94643a(14) =228485a(15) =551615a(16) =1331713a(17) =3215043a(18) =7761797a(19) =18738639a(20) =45239073a(21) =109216787a(22) =263672645a(23) =636562079a(24) =1536796801a(25) =3710155683a(26) =8957108165a(27) =21624372015a(28) =52205852193a(29) =126036076403