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), (-1, 0, 1), (0, 0, -1), (0, 1, 1), (1, -1, -1)}.
A148618
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), (-1, 0, 1), (0, 0, -1), (0, 1, 1), (1, -1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =21a(5) =59a(6) =203a(7) =656a(8) =2360a(9) =8279a(10) =30457a(11) =111778a(12) =423170a(13) =1606104a(14) =6196473a(15) =24039807a(16) =94443586a(17) =373226937a(18) =1486772000a(19) =5954569955a(20) =24010156235a(21) =97308768496a(22) =396383171623
External references
- oeis: A148618