Number of edge covers in the n-book graph.

Terms

a(0) =5a(1) =41a(2) =233a(3) =1217a(4) =6185a(5) =31121a(6) =155993a(7) =780737a(8) =3905225a(9) =19529201a(10) =97652153a(11) =488273057a(12) =2441389865a(13) =12206998481a(14) =61035090713a(15) =305175650177