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, 0, 0), (1, -1, 0), (1, 0, -1), (1, 0, 1), (1, 1, 0)}.
A150764
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, 0, 0), (1, -1, 0), (1, 0, -1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =126a(5) =530a(6) =2330a(7) =10290a(8) =46410a(9) =210462a(10) =966042a(11) =4455066a(12) =20703606a(13) =96597930a(14) =453102078a(15) =2132350506a(16) =10074190698a(17) =47726505398a(18) =226781353370
External references
- oeis: A150764