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, -1), (-1, -1, 0), (0, 1, 0), (1, 1, -1), (1, 1, 1)}.
A150459
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, -1), (-1, -1, 0), (0, 1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =97a(5) =388a(6) =1603a(7) =6740a(8) =28805a(9) =124516a(10) =543663a(11) =2392639a(12) =10602985a(13) =47261506a(14) =211741279a(15) =952868309a(16) =4304985813a(17) =19517751988a(18) =88766948783a(19) =404856105533
External references
- oeis: A150459