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, -1, 1), (0, 1, -1), (1, 1, 0)}.
A149275
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, -1, 1), (0, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =42a(5) =151a(6) =597a(7) =2378a(8) =9788a(9) =40882a(10) =173588a(11) =745698a(12) =3237487a(13) =14175810a(14) =62544126a(15) =277703191a(16) =1240091242a(17) =5564821058a(18) =25082363701a(19) =113493074323a(20) =515341994973
External references
- oeis: A149275