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, 0), (0, 0, 1), (0, 1, -1), (1, 0, 1)}.
A150392
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, 0), (0, 0, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =90a(5) =357a(6) =1438a(7) =5978a(8) =25263a(9) =108036a(10) =468430a(11) =2047644a(12) =9022100a(13) =40038823a(14) =178625997a(15) =801073426a(16) =3608410329a(17) =16315029606a(18) =74029303462a(19) =336934567335
External references
- oeis: A150392