Number of walks from (0,0) to (n,n) in the region 0 <= x-y <= 6 with the steps (1,0), (0, 1), (2,0) and (0,2).
A127620
Number of walks from (0,0) to (n,n) in the region 0 <= x-y <= 6 with the steps (1,0), (0, 1), (2,0) and (0,2).
Terms
- a(0) =1a(1) =1a(2) =5a(3) =22a(4) =117a(5) =654a(6) =3843a(7) =22882a(8) =137443a(9) =827998a(10) =4995443a(11) =30155494a(12) =182083275a(13) =1099560942a(14) =6640309323a(15) =40101959542a(16) =242184540139
External references
- oeis: A127620