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), (0, 1, -1), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
A150217
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), (0, 1, -1), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =82a(5) =315a(6) =1286a(7) =5353a(8) =22542a(9) =96551a(10) =419059a(11) =1827498a(12) =8053542a(13) =35743165a(14) =159226263a(15) =713724911a(16) =3214402656a(17) =14516617933a(18) =65831412369a(19) =299530825366
External references
- oeis: A150217