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, 0, 1), (0, -1, 1), (0, 1, -1), (1, 0, 0)}.
A148113
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, 0, 1), (0, -1, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =29a(6) =85a(7) =272a(8) =881a(9) =2994a(10) =10457a(11) =37331a(12) =136186a(13) =504933a(14) =1900834a(15) =7262202a(16) =28045612a(17) =109579558a(18) =432061289a(19) =1718479515a(20) =6892069642a(21) =27827372942a(22) =113161355347a(23) =462806743799
External references
- oeis: A148113