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, 0, 1), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
A150656
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, 0, 1), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =28a(4) =120a(5) =533a(6) =2431a(7) =11306a(8) =53313a(9) =253981a(10) =1219497a(11) =5892033a(12) =28610302a(13) =139489397a(14) =682344795a(15) =3347079833a(16) =16456433524a(17) =81069630699a(18) =400043687892
External references
- oeis: A150656