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, 0, 0), (-1, 0, 1), (0, 0, -1), (1, -1, 1), (1, 1, 1)}.
A149774
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, 0, 0), (-1, 0, 1), (0, 0, -1), (1, -1, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =79a(5) =329a(6) =1427a(7) =6303a(8) =28543a(9) =129815a(10) =594231a(11) =2743043a(12) =12763939a(13) =59677967a(14) =280202503a(15) =1320670335a(16) =6246890303a(17) =29642553197a(18) =141049086189a(19) =672738459979
External references
- oeis: A149774