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, 1)}.
A151382
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, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =19a(4) =102a(5) =594a(6) =3654a(7) =23365a(8) =153764a(9) =1034670a(10) =7086718a(11) =49245328a(12) =346337916a(13) =2460569420a(14) =17633289260a(15) =127316202543a(16) =925281165610
External references
- oeis: A151382