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, 0, 0), (0, -1, 1), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
A150862
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, 0, 0), (0, -1, 1), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =143a(5) =646a(6) =3013a(7) =14216a(8) =67939a(9) =327200a(10) =1585980a(11) =7725527a(12) =37777737a(13) =185320840a(14) =911426406a(15) =4492064943a(16) =22178844495a(17) =109668362611a(18) =542968554654
External references
- oeis: A150862