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, -1), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
A150162
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, -1), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =75a(5) =284a(6) =1137a(7) =4644a(8) =19393a(9) =81898a(10) =351374a(11) =1520815a(12) =6638275a(13) =29196703a(14) =129280300a(15) =575406783a(16) =2573623071a(17) =11562972805a(18) =52147022964a(19) =235977654475
External references
- oeis: A150162