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, 0, 1), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
A150935
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, 0, 1), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =33a(4) =159a(5) =671a(6) =3288a(7) =14719a(8) =72664a(9) =335880a(10) =1664988a(11) =7849149a(12) =39004188a(13) =186294948a(14) =927213201a(15) =4469530443a(16) =22269520555a(17) =108073079585a(18) =538890342551
External references
- oeis: A150935