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, 0, -1), (0, 1, 0), (1, -1, 1)}.
A148384
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, 0, -1), (0, 1, 0), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =50a(6) =160a(7) =541a(8) =1929a(9) =6991a(10) =25666a(11) =95870a(12) =365059a(13) =1406865a(14) =5475056a(15) =21498955a(16) =85224391a(17) =340417424a(18) =1369089644a(19) =5538774047a(20) =22539313700a(21) =92188639792a(22) =378882425805
External references
- oeis: A148384