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, 0), (-1, 1, -1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
A148402
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, 0), (-1, 1, -1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =17a(5) =49a(6) =181a(7) =597a(8) =2331a(9) =8307a(10) =33727a(11) =126173a(12) =525336a(13) =2036773a(14) =8631777a(15) =34389299a(16) =147778912a(17) =601289599a(18) =2612887714a(19) =10812163555a(20) =47409130369a(21) =198919256443a(22) =878738363940
External references
- oeis: A148402