Number of 5-cycles in the n-halved cube graph.

Terms

a(0) =0a(1) =0a(2) =0a(3) =288a(4) =5664a(5) =50688a(6) =314496a(7) =1569792a(8) =6773760a(9) =26320896a(10) =94482432a(11) =318726144a(12) =1022681088a(13) =3148873728a(14) =9366110208a(15) =27051687936a(16) =76178522112a(17) =209845223424a(18) =566967140352