Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, 0), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
A150267
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, 0), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =89a(5) =370a(6) =1585a(7) =6986a(8) =31317a(9) =142230a(10) =654000a(11) =3035518a(12) =14185121a(13) =66714076a(14) =315565582a(15) =1499290539a(16) =7150770043a(17) =34228613264a(18) =164347352327a(19) =791165781965
External references
- oeis: A150267