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), (0, -1, 1), (0, 0, 1), (1, 0, 0), (1, 1, -1)}.
A150154
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), (0, -1, 1), (0, 0, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =74a(5) =290a(6) =1188a(7) =5017a(8) =21686a(9) =95455a(10) =426361a(11) =1927329a(12) =8800274a(13) =40523430a(14) =187956576a(15) =877227830a(16) =4116388332a(17) =19407778601a(18) =91885244947a(19) =436636453613
External references
- oeis: A150154