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, 0), (-1, 0, -1), (0, -1, 1), (0, 1, 0), (1, 0, 0)}.
A149927
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, 0), (-1, 0, -1), (0, -1, 1), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =15a(4) =48a(5) =163a(6) =573a(7) =2093a(8) =7827a(9) =29830a(10) =115754a(11) =455939a(12) =1817086a(13) =7316796a(14) =29756708a(15) =122012669a(16) =503813023a(17) =2094285936a(18) =8759168442a(19) =36826653285a(20) =155577457016a(21) =660287621380
External references
- oeis: A149927