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, 0), (0, 1, 0), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
A151159
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, 0), (0, 1, 0), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =47a(4) =211a(5) =967a(6) =4545a(7) =21595a(8) =103560a(9) =500728a(10) =2432736a(11) =11872654a(12) =58147671a(13) =285541655a(14) =1405564858a(15) =6931965131a(16) =34241853082a(17) =169380533106a(18) =838827662629
External references
- oeis: A151159