Number of 6-cycles in the n-Dorogovtsev-Goltsev-Mendes graph.

Terms

a(0) =0a(1) =0a(2) =1a(3) =38a(4) =276a(5) =1270a(6) =4745a(7) =15936a(8) =50608a(9) =156116a(10) =474585a(11) =1432450a(12) =4309076a(13) =12942618a(14) =38847601a(15) =116567660a(16) =349733760a(17) =1049238856a(18) =3147761873a(19) =9443339646a(20) =28330082740a(21) =84990322910a(22) =254971055481a(23) =764913266488