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, 0), (1, -1, 0)}.
A149864
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, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =13a(4) =40a(5) =131a(6) =452a(7) =1562a(8) =5644a(9) =20799a(10) =78589a(11) =297261a(12) =1148443a(13) =4476655a(14) =17703933a(15) =70069434a(16) =280865518a(17) =1131469211a(18) =4601137351a(19) =18721075331a(20) =76825846434a(21) =316282614821
External references
- oeis: A149864