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), (0, 0, 1), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.
A151130
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), (0, 0, 1), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =45a(4) =197a(5) =889a(6) =4101a(7) =19231a(8) =91215a(9) =436473a(10) =2102946a(11) =10186704a(12) =49561448a(13) =241995991a(14) =1185107619a(15) =5818191754a(16) =28623970526a(17) =141074855063a(18) =696366312010
External references
- oeis: A151130