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, 1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
A148365
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, 1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =49a(6) =169a(7) =600a(8) =2182a(9) =8068a(10) =30230a(11) =114477a(12) =437205a(13) =1681223a(14) =6501377a(15) =25258166a(16) =98507415a(17) =385422665a(18) =1512133656a(19) =5946328430a(20) =23429717559a(21) =92475097681a(22) =365528889119
External references
- oeis: A148365