Number of odd chordless cycles in the 2n-Moebius ladder graph.

Terms

a(0) =0a(1) =4a(2) =8a(3) =16a(4) =48a(5) =124a(6) =320a(7) =844a(8) =2208a(9) =5776a(10) =15128a(11) =39604a(12) =103680a(13) =271444a(14) =710648a(15) =1860496a(16) =4870848a(17) =12752044a(18) =33385280a(19) =87403804a(20) =228826128a(21) =599074576a(22) =1568397608a(23) =4106118244a(24) =10749957120a(25) =28143753124a(26) =73681302248a(27) =192900153616a(28) =505019158608