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, 1), (0, 0, -1), (1, 0, 1), (1, 1, 0)}.
A150769
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, 1), (0, 0, -1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =128a(5) =549a(6) =2450a(7) =11046a(8) =50673a(9) =234383a(10) =1094288a(11) =5140068a(12) =24286027a(13) =115257393a(14) =549211095a(15) =2625763721a(16) =12591106792a(17) =60531714120a(18) =291672527621
External references
- oeis: A150769