Number of independent vertex sets and vertex covers in the n-antiprism graph.

Terms

a(0) =3a(1) =1a(2) =5a(3) =10a(4) =21a(5) =46a(6) =98a(7) =211a(8) =453a(9) =973a(10) =2090a(11) =4489a(12) =9642a(13) =20710a(14) =44483a(15) =95545a(16) =205221a(17) =440794a(18) =946781a(19) =2033590a(20) =4367946a(21) =9381907a(22) =20151389a(23) =43283149a(24) =92967834a(25) =199685521a(26) =428904338a(27) =921243214a(28) =1978737411a(29) =4250128177