Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0), ending on the vertical axis and consisting of 2 n steps taken from {(-1, 1), (1, -1), (1, 0), (1, 1)}.
A151418
Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0), ending on the vertical axis and consisting of 2 n steps taken from {(-1, 1), (1, -1), (1, 0), (1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =11a(3) =78a(4) =632a(5) =5547a(6) =51343a(7) =493561a(8) =4880756a(9) =49335396a(10) =507489524a(11) =5295338330a(12) =55912919498a(13) =596320327868
External references
- oeis: A151418