Number of odd chordless cycles in the (2n+1)-prism graph.

Terms

a(0) =2a(1) =12a(2) =30a(3) =74a(4) =200a(5) =522a(6) =1362a(7) =3572a(8) =9350a(9) =24474a(10) =64080a(11) =167762a(12) =439202a(13) =1149852a(14) =3010350a(15) =7881194a(16) =20633240a(17) =54018522a(18) =141422322a(19) =370248452a(20) =969323030a(21) =2537720634a(22) =6643838880a(23) =17393796002a(24) =45537549122a(25) =119218851372a(26) =312119004990a(27) =817138163594