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), (0, -1, 1), (1, 0, -1), (1, 1, 0)}.
A149490
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), (0, -1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =14a(4) =55a(5) =229a(6) =982a(7) =4323a(8) =19432a(9) =88523a(10) =408097a(11) =1899317a(12) =8904553a(13) =42017023a(14) =199307875a(15) =949663789a(16) =4542475867a(17) =21800444196a(18) =104929173198a(19) =506335199834
External references
- oeis: A149490