Number of 6-cycles in the n-Sierpinski tetrahedron graph.

Terms

a(0) =0a(1) =218a(2) =876a(3) =3504a(4) =14016a(5) =56064a(6) =224256a(7) =897024a(8) =3588096a(9) =14352384a(10) =57409536a(11) =229638144a(12) =918552576a(13) =3674210304a(14) =14696841216a(15) =58787364864a(16) =235149459456a(17) =940597837824