Number of chordless cycles in the n-web graph.

Terms

a(0) =3a(1) =10a(2) =17a(3) =26a(4) =37a(5) =54a(6) =83a(7) =132a(8) =211a(9) =336a(10) =535a(11) =856a(12) =1377a(13) =2222a(14) =3589a(15) =5798a(16) =9369a(17) =15146a(18) =24495a(19) =39624a(20) =64103a(21) =103708a(22) =167787a(23) =271468a(24) =439229a(25) =710674a(26) =1149881a(27) =1860530a(28) =3010381a(29) =4870878