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, 1), (-1, 1, 1), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
A149806
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, 1), (-1, 1, 1), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =91a(5) =391a(6) =1909a(7) =8707a(8) =42925a(9) =201635a(10) =999681a(11) =4779393a(12) =23770533a(13) =114926985a(14) =572668035a(15) =2789841689a(16) =13917541155a(17) =68165695833a(18) =340305135859
External references
- oeis: A149806