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, -1, 1), (1, 0, -1), (1, 1, 1)}.
A149778
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, -1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =79a(5) =339a(6) =1471a(7) =6613a(8) =29997a(9) =137413a(10) =637513a(11) =2966189a(12) =13920875a(13) =65577641a(14) =310297181a(15) =1474255015a(16) =7023529091a(17) =33568167643a(18) =160810363573a(19) =772120473193
External references
- oeis: A149778