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), (-1, 1, 0), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
A150266
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), (-1, 1, 0), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =89a(5) =363a(6) =1533a(7) =6634a(8) =29366a(9) =131284a(10) =594763a(11) =2713624a(12) =12490006a(13) =57830211a(14) =269587366a(15) =1261371336a(16) =5929321279a(17) =27968069703a(18) =132435965099a(19) =628672599727
External references
- oeis: A150266