Number of maximal independent vertex sets (and minimal vertex covers) in the n-wheel graph.

Terms

a(0) =4a(1) =3a(2) =6a(3) =6a(4) =8a(5) =11a(6) =13a(7) =18a(8) =23a(9) =30a(10) =40a(11) =52a(12) =69a(13) =91a(14) =120a(15) =159a(16) =210a(17) =278a(18) =368a(19) =487a(20) =645a(21) =854a(22) =1131a(23) =1498a(24) =1984a(25) =2628a(26) =3481a(27) =4611a(28) =6108a(29) =8091