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, 0, 1), (1, -1, -1), (1, 1, -1)}.
A148379
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, 0, 1), (1, -1, -1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =47a(6) =161a(7) =549a(8) =2048a(9) =7510a(10) =28667a(11) =111611a(12) =443415a(13) =1766050a(14) =7177269a(15) =29483692a(16) =122087496a(17) =508667088a(18) =2142850714a(19) =9084440413a(20) =38686500326a(21) =165764680483a(22) =714848528251
External references
- oeis: A148379