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, 1), (-1, 0, 0), (0, -1, 0), (1, 1, 0)}.
A149115
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, 1), (-1, 0, 0), (0, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =32a(5) =95a(6) =335a(7) =1143a(8) =4040a(9) =14731a(10) =53837a(11) =200909a(12) =755416a(13) =2877693a(14) =11045026a(15) =42621291a(16) =166279678a(17) =650781327a(18) =2562641223a(19) =10144316095a(20) =40347911762a(21) =161069462279a(22) =645317015486
External references
- oeis: A149115