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, 1), (0, -1, 1), (0, 1, -1), (0, 1, 0), (1, 1, 1)}.
A150874
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, 1), (0, -1, 1), (0, 1, -1), (0, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =33a(4) =147a(5) =665a(6) =3069a(7) =14351a(8) =67682a(9) =321645a(10) =1536554a(11) =7373439a(12) =35510303a(13) =171523172a(14) =830617655a(15) =4030944844a(16) =19598755697a(17) =95445770015a(18) =465489512930
External references
- oeis: A150874