Number of walks of length n along the edges of an octahedron starting and ending at a vertex and also ( with a(0)=0 ) between two opposite vertices.
A054881
Number of walks of length n along the edges of an octahedron starting and ending at a vertex and also ( with a(0)=0 ) between two opposite vertices.
Terms
- a(0) =1a(1) =0a(2) =4a(3) =8a(4) =48a(5) =160a(6) =704a(7) =2688a(8) =11008a(9) =43520a(10) =175104a(11) =698368a(12) =2797568a(13) =11182080a(14) =44744704a(15) =178946048a(16) =715849728a(17) =2863267840a(18) =11453333504a(19) =45812809728a(20) =183252287488a(21) =733007052800
External references
- oeis: A054881