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, 0, -1), (0, -1, 1), (1, 0, 0), (1, 1, 1)}.
A150496
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, 0, -1), (0, -1, 1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =101a(5) =408a(6) =1705a(7) =7240a(8) =31295a(9) =136736a(10) =601885a(11) =2670989a(12) =11928673a(13) =53590728a(14) =241750945a(15) =1095001345a(16) =4977673451a(17) =22703347940a(18) =103836508801a(19) =476080076739
External references
- oeis: A150496