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, 1, 0), (0, 0, -1), (1, 0, 1)}.
A149135
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, 1, 0), (0, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =34a(5) =114a(6) =406a(7) =1503a(8) =5592a(9) =21416a(10) =83928a(11) =327244a(12) =1301822a(13) =5202586a(14) =20956424a(15) =85286483a(16) =347725526a(17) =1426195886a(18) =5880016708a(19) =24319110834a(20) =101086632952a(21) =421341186950
External references
- oeis: A149135