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), (-1, 1, 1), (1, 0, -1), (1, 0, 1)}.
A149312
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), (-1, 1, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =50a(5) =164a(6) =758a(7) =2751a(8) =13170a(9) =50788a(10) =244390a(11) =974152a(12) =4753878a(13) =19509060a(14) =95424222a(15) =398465821a(16) =1962358882a(17) =8331842126a(18) =41081869566a(19) =176337842820a(20) =872788848934
External references
- oeis: A149312