Number of edge covers in the n-wheel graph.

Terms

a(0) =0a(1) =2a(2) =10a(3) =41a(4) =154a(5) =562a(6) =2023a(7) =7240a(8) =25842a(9) =92129a(10) =328270a(11) =1169390a(12) =4165231a(13) =14835316a(14) =52837774a(15) =188186161a(16) =670237602a(17) =2387090906a(18) =8501757271a(19) =30279468752a(20) =107841945274a(21) =384084812929