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, 0), (1, 1, 1)}.
A151170
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, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =49a(4) =213a(5) =941a(6) =4256a(7) =19461a(8) =90037a(9) =419683a(10) =1970031a(11) =9296409a(12) =44076805a(13) =209789295a(14) =1001944193a(15) =4799290196a(16) =23048478723a(17) =110943816417a(18) =535126065674
External references
- oeis: A151170