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, -1), (1, 0, 0), (1, 1, 1)}.
A150778
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, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =130a(5) =568a(6) =2569a(7) =11745a(8) =54532a(9) =255124a(10) =1203652a(11) =5710145a(12) =27228958a(13) =130366881a(14) =626386210a(15) =3018558459a(16) =14584522337a(17) =70625103916a(18) =342682597315
External references
- oeis: A150778