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, -1), (-1, 0, 0), (0, 0, 1), (1, 0, -1), (1, 1, 1)}.
A150733
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, -1), (-1, 0, 0), (0, 0, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =29a(4) =122a(5) =513a(6) =2243a(7) =9945a(8) =44789a(9) =203815a(10) =936687a(11) =4332665a(12) =20183601a(13) =94464361a(14) =444300666a(15) =2097754746a(16) =9938925775a(17) =47239005352a(18) =225124194033
External references
- oeis: A150733