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, -1, 1), (-1, 0, 1), (0, 1, 1), (1, 0, -1)}.
A148445
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, -1, 1), (-1, 0, 1), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =17a(5) =49a(6) =170a(7) =563a(8) =1932a(9) =7030a(10) =25301a(11) =93316a(12) =352510a(13) =1328907a(14) =5104863a(15) =19787771a(16) =76973523a(17) =303046762a(18) =1198411018a(19) =4763383468a(20) =19074052627a(21) =76619234449a(22) =309290295334
External references
- oeis: A148445