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, 1), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
A150514
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, 1), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =103a(5) =423a(6) =1867a(7) =8180a(8) =37395a(9) =169782a(10) =792576a(11) =3678418a(12) =17406501a(13) =81974128a(14) =391563653a(15) =1863052796a(16) =8959881496a(17) =42952712261a(18) =207628630330
External references
- oeis: A150514