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, 1), (-1, 0, 1), (0, -1, 1), (1, 1, -1), (1, 1, 1)}.
A149748
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, 1), (-1, 0, 1), (0, -1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =79a(5) =327a(6) =1487a(7) =6677a(8) =30717a(9) =142149a(10) =664989a(11) =3122187a(12) =14783737a(13) =70121443a(14) =334613209a(15) =1599628705a(16) =7675931117a(17) =36908653065a(18) =177910757393a(19) =859149747059
External references
- oeis: A149748