Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1, -1), (-1, 1), (0, 1), (1, -1), (1, 1)}.
A151302
Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1, -1), (-1, 1), (0, 1), (1, -1), (1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =29a(4) =129a(5) =535a(6) =2467a(7) =10844a(8) =50982a(9) =231404a(10) =1101030a(11) =5099358a(12) =24460460a(13) =114857406a(14) =554172828a(15) =2628163725a(16) =12736564173a(17) =60855656041a(18) =295934172553
External references
- oeis: A151302