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), (1, 0, 0), (1, 1, 1)}.
A150773
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), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =128a(5) =559a(6) =2504a(7) =11446a(8) =52878a(9) =247011a(10) =1162047a(11) =5503850a(12) =26197543a(13) =125260037a(14) =601111800a(15) =2893859691a(16) =13970128793a(17) =67601744906a(18) =327818426179
External references
- oeis: A150773