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), (0, 1, 0), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
A151160
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), (0, 1, 0), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =47a(4) =211a(5) =981a(6) =4643a(7) =22249a(8) =107577a(9) =523415a(10) =2559557a(11) =12562673a(12) =61844559a(13) =305170937a(14) =1508729183a(15) =7470679239a(16) =37039545501a(17) =183839555485a(18) =913278679657
External references
- oeis: A151160