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, 0, 0), (0, 0, 1), (0, 1, -1), (1, -1, 0)}.
A148095
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, 0, 0), (0, 0, 1), (0, 1, -1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =25a(6) =75a(7) =222a(8) =696a(9) =2203a(10) =7371a(11) =24787a(12) =86008a(13) =301117a(14) =1077079a(15) =3884641a(16) =14241326a(17) =52666805a(18) =196980204a(19) =742074660a(20) =2821601164a(21) =10806383704a(22) =41688390675a(23) =161765527299a(24) =631511352222
External references
- oeis: A148095